DE

Network Curve Atlas beta

Where the squeal is likely to hide, mapped across networks.

The Network Curve Atlas models curve-squeal risk from track geometry and market data. It is modelled, not measured, and not a claim about any named network. It reads the shape of a network to show where curves are most likely to squeal. Trams first other networks to follow!

414 networks · scores as of 2026-07-31

Modelled, not measured.

Where the index reaches

Every scored network, on one map.

World
Europe (enlarged)

scored network · marker size follows scored-curve count · Modelled, not measured.

At a glance

414
networks scored
43,864
curves scored
56
countries
18
track gauges represented

Scored networks

Susceptibility is modelled, not measured.

Every network scored reaches the tightest geometry band (a sub-30 m curve, score 1.0): tight curves are universal on street-running tram track. Differentiation comes from how many tight curves a network has and how their radii are distributed, not from a single peak.

NetworkScored curvesGaugeScale
Vienna tram network1,0441435 mm
Saint Petersburg tram network7381524 mm
Prague tram network7211435 mm
Brussels tram network7121435 mm
Berlin tram network6701435 mm
The Hague tram network6471435 mm
Leipzig tram network5891458 mm
Dusseldorf Stadtbahn5721435 mm
Rhine-Neckar tram network5681000 mm
Moscow tram network5661524 mm
Amsterdam tram network5561435 mm
Wroclaw tram network5231435 mm
Upper Silesian interurban tram5151435 mm
Dresden tram network5141450 mm
Warsaw tram network4901435 mm
Rotterdam tram network4851435 mm
Helsinki tram network4801000 mm
Antwerp tram network4541000 mm
Cologne Stadtbahn4531435 mm
Budapest tram network4501435 mm
Frankfurt tram network4351435 mm
Melbourne tram network4331435 mm
Stuttgart Stadtbahn4251435 mm
Paris (Ile-de-France) tramway4231435 mm
Gothenburg tram network4071435 mm
Show all networks (414)
NetworkScored curvesGaugeScale
Munich tram network4051435 mm
Krakow tram network4011435 mm
Montpellier tramway3591435 mm
Essen / Mulheim tram network3551000 mm
Brno tram network3461435 mm
Karlsruhe Stadtbahn3291435 mm
Bremen tram network3131435 mm
Nizhny Novgorod tram network3121524 mm
Hannover Stadtbahn2881435 mm
Lodz tram network2811000 mm
Szczecin tramway2791435 mm
Bucharest tram network2771435 mm
Sofia tram network2771009 mm
Manchester Metrolink2681435 mm
Odesa tram network2631524 mm
Yekaterinburg tram network2591524 mm
Magdeburg tram network2581435 mm
Innsbruck tram network2541000 mm
Kassel tram network2521435 mm
Dnipro tram network2501524 mm
Kyiv tram network2441524 mm
Poznan tram network2431435 mm
Kharkiv tram network2401524 mm
Lyon tramway2301435 mm
Turin tram network2301435 mm
Graz tram network2291435 mm
Halle (Saale) tram network2251000 mm
Augsburg tram network2201000 mm
Nuremberg tramway2151435 mm
Riga tram network2111524 mm
Gdańsk tramway2101435 mm
Strasbourg tramway2051435 mm
Portland MAX Light Rail2031435 mm
Samara tram network2021524 mm
Lisbon tramway200900 mm
Erfurt tram network1961000 mm
Zagreb tram network1961000 mm
Toronto streetcar system1951495 mm
Bern tram network1851000 mm
Oslo tram network1851435 mm
Stockholm tram network1851435 mm
Freiburg tram network1841000 mm
Casablanca tramway1801435 mm
Magnitogorsk tramway1761524 mm
London tramway1671435 mm
Rome tramway1601445 mm
Belgian Coast Tram (Kusttram)1551000 mm
San Francisco Muni Metro1541435 mm
Novosibirsk tram network1531524 mm
Athens tramway1521435 mm
Bydgoszcz tramway1521000 mm
Perm tram network1511524 mm
Lviv tram network1501000 mm
Geneva tramway1481000 mm
Bochum / Gelsenkirchen tram network1451000 mm
Grenoble tramway1451435 mm
Liberec tramway1431435 mm
Nantes tramway1401435 mm
Nottingham Express Transit1381435 mm
Potsdam tram network1371435 mm
Chelyabinsk tram network1361524 mm
Porto Metro (light rail)1351435 mm
Krasnodar tram network1331524 mm
Brest tramway1321435 mm
Caen tramway1321435 mm
Madrid tramway1321435 mm
Bratislava tram network1311000 mm
Kryvyi Rih tramway1311524 mm
Kryvyi Rih tramway1311520 mm
Tunis light rail (Metro leger)1311435 mm
Kazan tram network1271524 mm
Cottbus tramway1261000 mm
Istanbul tram network1261435 mm
Rostock tram network1251435 mm
Bielefeld Stadtbahn1231000 mm
Iași tramway1231000 mm
Chemnitz tramway1201435 mm
Valencia tramway1201000 mm
Lusail tramway1191435 mm
Pittsburgh tramway1191588 mm
Jena tramway1181000 mm
Sheffield Supertram1181435 mm
Barnaul tramway1171524 mm
Ulyanovsk tramway1151524 mm
Darmstadt tramway1121000 mm
Phoenix tramway1121435 mm
Linz tram network111900 mm
Florence tramway1091435 mm
Ostrava tram network1081435 mm
Alicante tramway1071000 mm
Plauen tramway1071000 mm
Ulm-Neu-Ulm tramway1071000 mm
Bergen tramway1051435 mm
Tula tramway1051524 mm
Kaliningrad tramway1041000 mm
Zaporizhzhia tram network1041524 mm
Belgrade tram network1031000 mm
Kursk tramway1011524 mm
Omsk tramway1011524 mm
Zwickau tramway1011000 mm
Ufa tramway1001524 mm
İzmir tramway981435 mm
Kemerovo tramway981524 mm
Würzburg tramway971000 mm
Denver tramway951435 mm
Gera tramway951000 mm
Dallas tramway931435 mm
Nizhni Tagil tramway931524 mm
Barcelona tram network921435 mm
Toruń tramway921000 mm
Los Angeles Metro Rail911435 mm
Volgograd tramway911524 mm
Philadelphia trolley (SEPTA)901581 mm
Naberezhnye Chelny tramway891524 mm
San Diego Trolley891435 mm
Elbląg tramway881000 mm
Norrköping tramway881435 mm
Rostov-on-Don tramway881524 mm
Khabarovsk tramway871524 mm
Tallinn tram network871067 mm
Oradea tramway861435 mm
Smolensk tramway861524 mm
Houston tramway851435 mm
Parla tramway831435 mm
Vitebsk tramway831524 mm
Le Mans tramway821435 mm
Minsk tram network821524 mm
Seattle tramway821435 mm
Hong Kong Tramways801067 mm
Angers tramway791435 mm
Marseille tramway791435 mm
Orsk tramway791524 mm
Osinniki tramway791524 mm
Orleans tramway781435 mm
Luas (Dublin)771435 mm
Zlatoust tramway771524 mm
London Trams (Croydon)751435 mm
Rabat and Salé tramway751435 mm
Taganrog tramway751524 mm
Antalya tramway731435 mm
Olomouc tramway731435 mm
Dortmund Stadtbahn721435 mm
Saratov tramway721524 mm
Vladikavkaz tramway721524 mm
Izhevsk tram network711524 mm
Boston Green Line (MBTA)701435 mm
Jerusalem tramway691435 mm
Brandenburg an der Havel tramway681000 mm
Braunschweig tramway681100 mm
Görlitz tramway681000 mm
Jinan tramway681435 mm
Lipetsk tramway681524 mm
Angarsk tramway671524 mm
Sétif tramway671435 mm
Kamianske tramway661524 mm
Saint-Etienne tramway661000 mm
Constantine tramway641435 mm
Luxembourg City tramway641435 mm
Mykolaiv tramway641524 mm
Szeged tramway641435 mm
Plzeň tramway631435 mm
Tenerife tramway631435 mm
Częstochowa tramway621435 mm
Doha (Education City campus) tramway621435 mm
İzmit (Kocaeli) tramway621435 mm
Mostaganem tramway621435 mm
Nagasaki tramway621435 mm
Birmingham tramway611435 mm
Prokopyevsk tramway611524 mm
Algiers tramway601435 mm
Lille tramway601000 mm
Camden to Trenton tramway591435 mm
Eskişehir tramway591000 mm
Hiroshima Electric Railway (Hiroden)591435 mm
Charleroi tramway581000 mm
Galați tramway581435 mm
Halberstadt tramway581000 mm
Kayseri tramway581435 mm
Murcia tramway581435 mm
Wuhan tramway581435 mm
Yaroslavl tramway581524 mm
Gmunden tramway571000 mm
Irkutsk tramway571524 mm
Sacramento tramway571435 mm
Tampere tramway571435 mm
Ulan-Ude tramway571524 mm
Biysk tramway561524 mm
San Jose tramway561435 mm
Timișoara tramway561435 mm
Liege tramway551000 mm
Granada tramway541435 mm
Grudziądz tramway541000 mm
Konotop tramway541524 mm
Cluj-Napoca tramway531435 mm
Kaohsiung tramway531435 mm
Tokyo tramway531372 mm
Bonn tramway521435 mm
Dessau tramway521000 mm
Minneapolis-Saint Paul tramway521435 mm
Almada tramway511435 mm
Baltimore tramway511435 mm
Guangzhou tramway511435 mm
Guangzhou tramway511435 mm
Most and Litvínov tramway511435 mm
Rouen tramway511435 mm
Vitoria-Gasteiz tramway511000 mm
Jersey City tramway501435 mm
Nice tramway501435 mm
Novocherkassk tramway501524 mm
Vinnytsia tramway501000 mm
Volzhsky tramway501524 mm
Zaragoza tramway501435 mm
Nordhausen tramway491000 mm
Daugavpils tramway481524 mm
Olsztyn tramway481435 mm
Utrecht tramway481435 mm
Arad tramway471000 mm
Gotha tramway471000 mm
Chengdu tramway461435 mm
Kolkata tramway461435 mm
St. Louis tramway461435 mm
Waterloo tramway461435 mm
Košice tramway451435 mm
Odense tramway451435 mm
Tomsk tramway451524 mm
New Orleans tramway441588 mm
Kolomna tramway431524 mm
Pyatigorsk tramway431000 mm
Debrecen tramway421435 mm
Detroit QLine421435 mm
Santos tramway421435 mm
Tempe S Line Streetcar421435 mm
Bilbao tramway411000 mm
Kumamoto tramway411435 mm
Messina tramway411435 mm
Orel tramway411524 mm
Achinsk tramway401524 mm
Saarbrücken tramway401435 mm
Le Havre tramway391435 mm
Osijek tramway391000 mm
Alexandria tram (El Raml)381435 mm
Buenos Aires tramway381000 mm
Heilbronn tramway381435 mm
Blackpool tramway371435 mm
Craiova tramway371435 mm
Matsuyama tramway371067 mm
Cadiz tramway361668 mm
Newark tramway361435 mm
Nizhnekamsk tramway361524 mm
Addis Ababa Light Rail351435 mm
Dalian tramway351435 mm
Edinburgh tramway351435 mm
Edmonton tramway351435 mm
Gorzów Wielkopolski tramway351435 mm
Mulhouse tramway351435 mm
Reșița tramway351435 mm
Oran tramway341435 mm
Palermo tramway341435 mm
Usolye-Sibirskoye tramway341524 mm
Cagliari tramway33950 mm
Miskolc tramway331435 mm
Suzhou tramway331435 mm
Charlotte tramway321435 mm
Huangshi tramway321435 mm
Pavlodar tramway321524 mm
Sidi Bel Abbès tramway321435 mm
St. Louis Loop Trolley321435 mm
Bursa tramway311435 mm
Konya tramway311435 mm
Osaka to Sakai tramway311435 mm
Tours tramway311435 mm
Kagoshima tramway301435 mm
Sydney Light Rail301435 mm
Valenciennes tramway301435 mm
Besancon tramway291435 mm
Brăila tramway291435 mm
Busan-Gimhae tramway291435 mm
Gaziantep tramway291435 mm
Kansas City Streetcar291435 mm
Memphis MATA Trolley281435 mm
Reims tramway281435 mm
Takaoka tramway281067 mm
Toyama tramway281067 mm
Tucson tramway281435 mm
Novotroitsk tramway271524 mm
Trondheim tramway271000 mm
Tyne and Wear tramway271435 mm
Liepaja tramway261000 mm
Naples tramway261435 mm
Samarkand tramway261000 mm
Sarajevo tramway261435 mm
Toulouse tramway261435 mm
Cuenca tramway251000 mm
Norfolk tramway251435 mm
Aarhus tramway241435 mm
Kamakura to Fujisawa tramway241067 mm
Krefeld tramway241000 mm
Nanjing tramway241435 mm
Oklahoma City Streetcar241435 mm
Samsun tramway241435 mm
Cherepovets tramway231524 mm
Cheryomushki tramway231524 mm
Avignon tramway221435 mm
El Paso Streetcar221435 mm
Milwaukee Streetcar (The Hop)221435 mm
Ploiești tramway221435 mm
Salt Lake City tramway221435 mm
Seoul (Gimpo) tramway211435 mm
Stary Oskol tramway211524 mm
Aubagne tramway201435 mm
Malaga tramway201435 mm
Ottawa tramway201435 mm
Cleveland tramway191435 mm
Huai'an tramway191435 mm
Mexico City tramway191000 mm
Mexico City tramway191000 mm
Ust-Kamenogorsk (Oskemen) tramway191520 mm
Cincinnati Streetcar181435 mm
Fukui tramway181435 mm
Novopolotsk tramway181524 mm
Salavat tramway181524 mm
Seattle tramway181435 mm
Kochi tramway171067 mm
Tel Aviv metropolitan area (Dankal) tramway171435 mm
Vladivostok tramway171524 mm
Fortaleza tramway161435 mm
Lund tramway161435 mm
Soller tramway16914 mm
Tacoma tramway161435 mm
Atlanta Streetcar151435 mm
New Taipei tramway151435 mm
Frankfurt (Oder) tramway151000 mm
Krasnoyarsk tramway151524 mm
Little Rock Metro Streetcar151435 mm
Mainz tramway151000 mm
Rio de Janeiro tramway151435 mm
Seville tramway151435 mm
Mazyr tramway141524 mm
Zhytomyr tramway141000 mm
Charlotte tramway131435 mm
Dallas Streetcar131435 mm
Jiaxing tramway131435 mm
Kyoto tramway131435 mm
Sapporo tramway131067 mm
Shenzhen tramway131435 mm
Tampa TECO Line Streetcar131435 mm
Calgary tramway121435 mm
Dujiangyan tramway121435 mm
Hódmezővásárhely tramway121435 mm
Kyoto to Otsu tramway121435 mm
Utsunomiya to Haga tramway121067 mm
Dijon tramway111435 mm
Okayama tramway111067 mm
Sanya tramway111435 mm
Sassari tramway11950 mm
Buffalo tramway101435 mm
Guadalajara tramway101435 mm
Krasnoturinsk tramway101524 mm
Mengzi tramway101435 mm
Qiubei (Wenshan) tramway101435 mm
Toyohashi tramway101067 mm
Hakodate tramway91372 mm
Tokyo tramway91372 mm
Seoul tramway91435 mm
Volchansk tramway81524 mm
Adelaide tramway71435 mm
Beijing tramway71435 mm
Beijing tramway71435 mm
Dubai tramway71435 mm
Foshan tramway71435 mm
Kenosha Streetcar71435 mm
Qingdao tramway71435 mm
Shanghai tramway71435 mm
Copenhagen tramway61435 mm
Foshan (Nanhai District) tramway61435 mm
Novokuznetsk tramway51524 mm
Bergamo tramway41435 mm
Newcastle tramway41435 mm
Tianshui tramway41435 mm
Vienna-Baden tramway31435 mm
Oberhausen tramway31000 mm
Schwerin tramway31435 mm
Changchun tramway21435 mm
Duisburg tramway21435 mm
Gold Coast tramway21435 mm
Kitakyushu to Nogata tramway21435 mm
Port Louis to Curepipe tramway21435 mm
Shenyang tramway21435 mm
Doha (Msheireb Downtown) tramway11435 mm

The networks, drawn from open geometry

Every network in the index, drawn from its real track centreline.

Each drawing is the network's OpenStreetMap track centreline. The coloured dots are modelled squeal hotspots: tight curves carrying high geometric susceptibility, before any mitigation. Open a network for its overview: rolling stock, key figures and its tightest curves.

414 of 414 networks

track centreline (OSM) 0.70 to 0.85 0.85 to 0.95 0.95 to 1.00 · Modelled, not measured.

Vienna tram network

Austria

1,044 curves · 1435 mm · 520 trams

Saint Petersburg tram network

Russia

738 curves · 1524 mm · 706 trams

Prague tram network

Czech Republic

721 curves · 1435 mm · 880 trams

Brussels tram network

Belgium

712 curves · 1435 mm · 410 trams

Berlin tram network

Germany

670 curves · 1435 mm · 340 trams

The Hague tram network

Netherlands

647 curves · 1435 mm · 144 trams

Leipzig tram network

Germany

589 curves · 1458 mm · 190 trams

Dusseldorf Stadtbahn

Germany

572 curves · 1435 mm · 330 trams

Rhine-Neckar tram network

Germany

568 curves · 1000 mm · 196 trams

Moscow tram network

Russia

566 curves · 1524 mm · 554 trams

Amsterdam tram network

Netherlands

556 curves · 1435 mm · 227 trams

Wroclaw tram network

Poland

523 curves · 1435 mm · 314 trams

Upper Silesian interurban tram

Poland

515 curves · 1435 mm · 289 trams

Dresden tram network

Germany

514 curves · 1450 mm · 170 trams

Warsaw tram network

Poland

490 curves · 1435 mm · 530 trams

Rotterdam tram network

Netherlands

485 curves · 1435 mm · 120 trams

Helsinki tram network

Finland

480 curves · 1000 mm · 120 trams

Antwerp tram network

Belgium

454 curves · 1000 mm

Cologne Stadtbahn

Germany

453 curves · 1435 mm · 390 trams

Budapest tram network

Hungary

450 curves · 1435 mm · 610 trams

Frankfurt tram network

Germany

435 curves · 1435 mm · 75 trams

Melbourne tram network

Australia

433 curves · 1435 mm · 475 trams

Stuttgart Stadtbahn

Germany

425 curves · 1435 mm · 160 trams

Paris (Ile-de-France) tramway

France

423 curves · 1435 mm · 450 trams

Gothenburg tram network

Sweden

407 curves · 1435 mm · 200 trams

Munich tram network

Germany

405 curves · 1435 mm · 120 trams

Krakow tram network

Poland

401 curves · 1435 mm · 430 trams

Montpellier tramway

France

359 curves · 1435 mm · 85 trams

Essen / Mulheim tram network

Germany

355 curves · 1000 mm · 108 trams

Brno tram network

Czech Republic

346 curves · 1435 mm · 281 trams

Karlsruhe Stadtbahn

Germany

329 curves · 1435 mm · 287 trams

Bremen tram network

Germany

313 curves · 1435 mm · 121 trams

Nizhny Novgorod tram network

Russia

312 curves · 1524 mm · 314 trams

Hannover Stadtbahn

Germany

288 curves · 1435 mm · 250 trams

Lodz tram network

Poland

281 curves · 1000 mm · 210 trams

Szczecin tramway

Poland

279 curves · 1435 mm

Bucharest tram network

Romania

277 curves · 1435 mm · 594 trams

Sofia tram network

Bulgaria

277 curves · 1009 mm

Manchester Metrolink

United Kingdom

268 curves · 1435 mm · 147 trams

Odesa tram network

Ukraine

263 curves · 1524 mm

Yekaterinburg tram network

Russia

259 curves · 1524 mm · 438 trams

Magdeburg tram network

Germany

258 curves · 1435 mm

Innsbruck tram network

Austria

254 curves · 1000 mm · 52 trams

Kassel tram network

Germany

252 curves · 1435 mm · 105 trams

Dnipro tram network

Ukraine

250 curves · 1524 mm · 254 trams

Kyiv tram network

Ukraine

244 curves · 1524 mm · 456 trams

Poznan tram network

Poland

243 curves · 1435 mm · 233 trams

Kharkiv tram network

Ukraine

240 curves · 1524 mm · 276 trams

Lyon tramway

France

230 curves · 1435 mm · 100 trams

Turin tram network

Italy

230 curves · 1435 mm · 190 trams

Graz tram network

Austria

229 curves · 1435 mm · 86 trams

Halle (Saale) tram network

Germany

225 curves · 1000 mm · 158 trams

Augsburg tram network

Germany

220 curves · 1000 mm · 77 trams

Nuremberg tramway

Germany

215 curves · 1435 mm

Riga tram network

Latvia

211 curves · 1524 mm · 250 trams

Gdańsk tramway

Poland

210 curves · 1435 mm

Strasbourg tramway

France

205 curves · 1435 mm · 95 trams

Portland MAX Light Rail

United States of America

203 curves · 1435 mm · 149 trams

Samara tram network

Russia

202 curves · 1524 mm · 714 trams

Lisbon tramway

Portugal

200 curves · 900 mm · 57 trams

Erfurt tram network

Germany

196 curves · 1000 mm · 84 trams

Zagreb tram network

Croatia

196 curves · 1000 mm · 259 trams

Toronto streetcar system

Canada

195 curves · 1495 mm · 264 trams

Bern tram network

Switzerland

185 curves · 1000 mm · 57 trams

Oslo tram network

Norway

185 curves · 1435 mm · 87 trams

Stockholm tram network

Sweden

185 curves · 1435 mm · 100 trams

Freiburg tram network

Germany

184 curves · 1000 mm · 73 trams

Casablanca tramway

Morocco

180 curves · 1435 mm · 124 trams

Magnitogorsk tramway

Russia

176 curves · 1524 mm

London tramway

United Kingdom

167 curves · 1435 mm

Rome tramway

Italy

160 curves · 1445 mm

Belgian Coast Tram (Kusttram)

Belgium

155 curves · 1000 mm

San Francisco Muni Metro

United States of America

154 curves · 1435 mm · 249 trams

Novosibirsk tram network

Russia

153 curves · 1524 mm · 114 trams

Athens tramway

Greece

152 curves · 1435 mm

Bydgoszcz tramway

Poland

152 curves · 1000 mm

Perm tram network

Russia

151 curves · 1524 mm · 131 trams

Lviv tram network

Ukraine

150 curves · 1000 mm · 195 trams

Geneva tramway

Switzerland

148 curves · 1000 mm

Bochum / Gelsenkirchen tram network

Germany

145 curves · 1000 mm · 132 trams

Grenoble tramway

France

145 curves · 1435 mm · 103 trams

Liberec tramway

Czech Republic

143 curves · 1435 mm

Nantes tramway

France

140 curves · 1435 mm · 90 trams

Nottingham Express Transit

United Kingdom

138 curves · 1435 mm · 37 trams

Potsdam tram network

Germany

137 curves · 1435 mm

Chelyabinsk tram network

Russia

136 curves · 1524 mm · 201 trams

Porto Metro (light rail)

Portugal

135 curves · 1435 mm · 120 trams

Krasnodar tram network

Russia

133 curves · 1524 mm · 359 trams

Brest tramway

France

132 curves · 1435 mm

Caen tramway

France

132 curves · 1435 mm

Madrid tramway

Spain

132 curves · 1435 mm

Bratislava tram network

Slovakia

131 curves · 1000 mm · 211 trams

Kryvyi Rih tramway

Ukraine

131 curves · 1524 mm

Kryvyi Rih tramway

Ukraine

131 curves · 1520 mm

Tunis light rail (Metro leger)

Tunisia

131 curves · 1435 mm · 190 trams

Kazan tram network

Russia

127 curves · 1524 mm · 47 trams

Cottbus tramway

Germany

126 curves · 1000 mm

Istanbul tram network

Turkey

126 curves · 1435 mm

Rostock tram network

Germany

125 curves · 1435 mm · 54 trams

Bielefeld Stadtbahn

Germany

123 curves · 1000 mm · 76 trams

Iași tramway

Romania

123 curves · 1000 mm

Chemnitz tramway

Germany

120 curves · 1435 mm

Valencia tramway

Spain

120 curves · 1000 mm

Lusail tramway

Qatar

119 curves · 1435 mm

Pittsburgh tramway

United States of America

119 curves · 1588 mm

Jena tramway

Germany

118 curves · 1000 mm

Sheffield Supertram

United Kingdom

118 curves · 1435 mm · 32 trams

Barnaul tramway

Russia

117 curves · 1524 mm

Ulyanovsk tramway

Russia

115 curves · 1524 mm

Darmstadt tramway

Germany

112 curves · 1000 mm

Phoenix tramway

United States of America

112 curves · 1435 mm

Linz tram network

Austria

111 curves · 900 mm · 66 trams

Florence tramway

Italy

109 curves · 1435 mm

Ostrava tram network

Czech Republic

108 curves · 1435 mm · 260 trams

Alicante tramway

Spain

107 curves · 1000 mm

Plauen tramway

Germany

107 curves · 1000 mm

Ulm-Neu-Ulm tramway

Germany

107 curves · 1000 mm

Bergen tramway

Norway

105 curves · 1435 mm

Tula tramway

Russia

105 curves · 1524 mm

Kaliningrad tramway

Russia

104 curves · 1000 mm

Zaporizhzhia tram network

Ukraine

104 curves · 1524 mm · 142 trams

Belgrade tram network

Serbia

103 curves · 1000 mm · 197 trams

Kursk tramway

Russia

101 curves · 1524 mm

Omsk tramway

Russia

101 curves · 1524 mm

Zwickau tramway

Germany

101 curves · 1000 mm

Ufa tramway

Russia

100 curves · 1524 mm

İzmir tramway

Turkey

98 curves · 1435 mm

Kemerovo tramway

Russia

98 curves · 1524 mm

Würzburg tramway

Germany

97 curves · 1000 mm

Denver tramway

United States of America

95 curves · 1435 mm

Gera tramway

Germany

95 curves · 1000 mm

Dallas tramway

United States of America

93 curves · 1435 mm

Nizhni Tagil tramway

Russia

93 curves · 1524 mm

Barcelona tram network

Spain

92 curves · 1435 mm · 41 trams

Toruń tramway

Poland

92 curves · 1000 mm

Los Angeles Metro Rail

United States of America

91 curves · 1435 mm · 337 trams

Volgograd tramway

Russia

91 curves · 1524 mm

Philadelphia trolley (SEPTA)

United States of America

90 curves · 1581 mm · 119 trams

Naberezhnye Chelny tramway

Russia

89 curves · 1524 mm

San Diego Trolley

United States of America

89 curves · 1435 mm

Elbląg tramway

Poland

88 curves · 1000 mm

Norrköping tramway

Sweden

88 curves · 1435 mm

Rostov-on-Don tramway

Russia

88 curves · 1524 mm

Khabarovsk tramway

Russia

87 curves · 1524 mm

Tallinn tram network

Estonia

87 curves · 1067 mm · 66 trams

Oradea tramway

Romania

86 curves · 1435 mm

Smolensk tramway

Russia

86 curves · 1524 mm

Houston tramway

United States of America

85 curves · 1435 mm

Parla tramway

Spain

83 curves · 1435 mm

Vitebsk tramway

Belarus

83 curves · 1524 mm

Le Mans tramway

France

82 curves · 1435 mm

Minsk tram network

Belarus

82 curves · 1524 mm · 151 trams

Seattle tramway

United States of America

82 curves · 1435 mm

Hong Kong Tramways

Hong Kong

80 curves · 1067 mm · 165 trams

Angers tramway

France

79 curves · 1435 mm

Marseille tramway

France

79 curves · 1435 mm

Orsk tramway

Russia

79 curves · 1524 mm

Osinniki tramway

Russia

79 curves · 1524 mm

Orleans tramway

France

78 curves · 1435 mm

Luas (Dublin)

Ireland

77 curves · 1435 mm · 40 trams

Zlatoust tramway

Russia

77 curves · 1524 mm

London Trams (Croydon)

United Kingdom

75 curves · 1435 mm · 30 trams

Rabat and Salé tramway

Morocco

75 curves · 1435 mm

Taganrog tramway

Russia

75 curves · 1524 mm

Antalya tramway

Turkey

73 curves · 1435 mm

Olomouc tramway

Czech Republic

73 curves · 1435 mm

Dortmund Stadtbahn

Germany

72 curves · 1435 mm · 136 trams

Saratov tramway

Russia

72 curves · 1524 mm

Vladikavkaz tramway

Russia

72 curves · 1524 mm

Izhevsk tram network

Russia

71 curves · 1524 mm · 227 trams

Boston Green Line (MBTA)

United States of America

70 curves · 1435 mm · 184 trams

Jerusalem tramway

Israel

69 curves · 1435 mm

Brandenburg an der Havel tramway

Germany

68 curves · 1000 mm

Braunschweig tramway

Germany

68 curves · 1100 mm

Görlitz tramway

Germany

68 curves · 1000 mm

Jinan tramway

People's Republic of China

68 curves · 1435 mm

Lipetsk tramway

Russia

68 curves · 1524 mm

Angarsk tramway

Russia

67 curves · 1524 mm

Sétif tramway

Algeria

67 curves · 1435 mm

Kamianske tramway

Ukraine

66 curves · 1524 mm

Saint-Etienne tramway

France

66 curves · 1000 mm

Constantine tramway

Algeria

64 curves · 1435 mm

Luxembourg City tramway

Luxembourg

64 curves · 1435 mm

Mykolaiv tramway

Ukraine

64 curves · 1524 mm

Szeged tramway

Hungary

64 curves · 1435 mm

Plzeň tramway

Czech Republic

63 curves · 1435 mm

Tenerife tramway

Spain

63 curves · 1435 mm

Częstochowa tramway

Poland

62 curves · 1435 mm

Doha (Education City campus) tramway

Qatar

62 curves · 1435 mm

İzmit (Kocaeli) tramway

Turkey

62 curves · 1435 mm

Mostaganem tramway

Algeria

62 curves · 1435 mm

Nagasaki tramway

Japan

62 curves · 1435 mm

Birmingham tramway

United Kingdom

61 curves · 1435 mm

Prokopyevsk tramway

Russia

61 curves · 1524 mm

Algiers tramway

Algeria

60 curves · 1435 mm

Lille tramway

France

60 curves · 1000 mm

Camden to Trenton tramway

United States of America

59 curves · 1435 mm

Eskişehir tramway

Turkey

59 curves · 1000 mm

Hiroshima Electric Railway (Hiroden)

Japan

59 curves · 1435 mm · 271 trams

Charleroi tramway

Belgium

58 curves · 1000 mm

Galați tramway

Romania

58 curves · 1435 mm

Halberstadt tramway

Germany

58 curves · 1000 mm

Kayseri tramway

Turkey

58 curves · 1435 mm

Murcia tramway

Spain

58 curves · 1435 mm

Wuhan tramway

People's Republic of China

58 curves · 1435 mm

Yaroslavl tramway

Russia

58 curves · 1524 mm

Gmunden tramway

Austria

57 curves · 1000 mm

Irkutsk tramway

Russia

57 curves · 1524 mm

Sacramento tramway

United States of America

57 curves · 1435 mm

Tampere tramway

Finland

57 curves · 1435 mm

Ulan-Ude tramway

Russia

57 curves · 1524 mm

Biysk tramway

Russia

56 curves · 1524 mm

San Jose tramway

United States of America

56 curves · 1435 mm

Timișoara tramway

Romania

56 curves · 1435 mm

Liege tramway

Belgium

55 curves · 1000 mm

Granada tramway

Spain

54 curves · 1435 mm

Grudziądz tramway

Poland

54 curves · 1000 mm

Konotop tramway

Ukraine

54 curves · 1524 mm

Cluj-Napoca tramway

Romania

53 curves · 1435 mm

Kaohsiung tramway

Taiwan

53 curves · 1435 mm

Tokyo tramway

Japan

53 curves · 1372 mm

Bonn tramway

Germany

52 curves · 1435 mm

Dessau tramway

Germany

52 curves · 1000 mm

Minneapolis-Saint Paul tramway

United States of America

52 curves · 1435 mm

Almada tramway

Portugal

51 curves · 1435 mm

Baltimore tramway

United States of America

51 curves · 1435 mm

Guangzhou tramway

People's Republic of China

51 curves · 1435 mm

Guangzhou tramway

People's Republic of China

51 curves · 1435 mm

Most and Litvínov tramway

Czech Republic

51 curves · 1435 mm

Rouen tramway

France

51 curves · 1435 mm

Vitoria-Gasteiz tramway

Spain

51 curves · 1000 mm

Jersey City tramway

United States of America

50 curves · 1435 mm

Nice tramway

France

50 curves · 1435 mm

Novocherkassk tramway

Russia

50 curves · 1524 mm

Vinnytsia tramway

Ukraine

50 curves · 1000 mm

Volzhsky tramway

Russia

50 curves · 1524 mm

Zaragoza tramway

Spain

50 curves · 1435 mm

Nordhausen tramway

Germany

49 curves · 1000 mm

Daugavpils tramway

Latvia

48 curves · 1524 mm

Olsztyn tramway

Poland

48 curves · 1435 mm

Utrecht tramway

Netherlands

48 curves · 1435 mm

Arad tramway

Romania

47 curves · 1000 mm

Gotha tramway

Germany

47 curves · 1000 mm

Chengdu tramway

People's Republic of China

46 curves · 1435 mm

Kolkata tramway

India

46 curves · 1435 mm

St. Louis tramway

United States of America

46 curves · 1435 mm

Waterloo tramway

Canada

46 curves · 1435 mm

Košice tramway

Slovakia

45 curves · 1435 mm

Odense tramway

Denmark

45 curves · 1435 mm

Tomsk tramway

Russia

45 curves · 1524 mm

New Orleans tramway

United States of America

44 curves · 1588 mm

Kolomna tramway

Russia

43 curves · 1524 mm

Pyatigorsk tramway

Russia

43 curves · 1000 mm

Debrecen tramway

Hungary

42 curves · 1435 mm

Detroit QLine

United States of America

42 curves · 1435 mm

Santos tramway

Brazil

42 curves · 1435 mm

Tempe S Line Streetcar

United States of America

42 curves · 1435 mm

Bilbao tramway

Spain

41 curves · 1000 mm

Kumamoto tramway

Japan

41 curves · 1435 mm

Messina tramway

Italy

41 curves · 1435 mm

Orel tramway

Russia

41 curves · 1524 mm

Achinsk tramway

Russia

40 curves · 1524 mm

Saarbrücken tramway

Germany

40 curves · 1435 mm

Le Havre tramway

France

39 curves · 1435 mm

Osijek tramway

Croatia

39 curves · 1000 mm

Alexandria tram (El Raml)

Egypt

38 curves · 1435 mm · 100 trams

Buenos Aires tramway

Argentina

38 curves · 1000 mm

Heilbronn tramway

Germany

38 curves · 1435 mm

Blackpool tramway

United Kingdom

37 curves · 1435 mm

Craiova tramway

Romania

37 curves · 1435 mm

Matsuyama tramway

Japan

37 curves · 1067 mm

Cadiz tramway

Spain

36 curves · 1668 mm

Newark tramway

United States of America

36 curves · 1435 mm

Nizhnekamsk tramway

Russia

36 curves · 1524 mm

Addis Ababa Light Rail

Ethiopia

35 curves · 1435 mm · 41 trams

Dalian tramway

People's Republic of China

35 curves · 1435 mm

Edinburgh tramway

United Kingdom

35 curves · 1435 mm

Edmonton tramway

Canada

35 curves · 1435 mm

Gorzów Wielkopolski tramway

Poland

35 curves · 1435 mm

Mulhouse tramway

France

35 curves · 1435 mm

Reșița tramway

Romania

35 curves · 1435 mm

Oran tramway

Algeria

34 curves · 1435 mm

Palermo tramway

Italy

34 curves · 1435 mm

Usolye-Sibirskoye tramway

Russia

34 curves · 1524 mm

Cagliari tramway

Italy

33 curves · 950 mm

Miskolc tramway

Hungary

33 curves · 1435 mm

Suzhou tramway

People's Republic of China

33 curves · 1435 mm

Charlotte tramway

United States of America

32 curves · 1435 mm

Huangshi tramway

People's Republic of China

32 curves · 1435 mm

Pavlodar tramway

Kazakhstan

32 curves · 1524 mm

Sidi Bel Abbès tramway

Algeria

32 curves · 1435 mm

St. Louis Loop Trolley

United States of America

32 curves · 1435 mm

Bursa tramway

Turkey

31 curves · 1435 mm

Konya tramway

Turkey

31 curves · 1435 mm

Osaka to Sakai tramway

Japan

31 curves · 1435 mm

Tours tramway

France

31 curves · 1435 mm

Kagoshima tramway

Japan

30 curves · 1435 mm

Sydney Light Rail

Australia

30 curves · 1435 mm · 60 trams

Valenciennes tramway

France

30 curves · 1435 mm

Besancon tramway

France

29 curves · 1435 mm

Brăila tramway

Romania

29 curves · 1435 mm

Busan-Gimhae tramway

South Korea

29 curves · 1435 mm

Gaziantep tramway

Turkey

29 curves · 1435 mm

Kansas City Streetcar

United States of America

29 curves · 1435 mm

Memphis MATA Trolley

United States of America

28 curves · 1435 mm

Reims tramway

France

28 curves · 1435 mm

Takaoka tramway

Japan

28 curves · 1067 mm

Toyama tramway

Japan

28 curves · 1067 mm

Tucson tramway

United States of America

28 curves · 1435 mm

Novotroitsk tramway

Russia

27 curves · 1524 mm

Trondheim tramway

Norway

27 curves · 1000 mm

Tyne and Wear tramway

United Kingdom

27 curves · 1435 mm

Liepaja tramway

Latvia

26 curves · 1000 mm

Naples tramway

Italy

26 curves · 1435 mm

Samarkand tramway

Uzbekistan

26 curves · 1000 mm

Sarajevo tramway

Bosnia and Herzegovina

26 curves · 1435 mm

Toulouse tramway

France

26 curves · 1435 mm

Cuenca tramway

Ecuador

25 curves · 1000 mm

Norfolk tramway

United States of America

25 curves · 1435 mm

Aarhus tramway

Denmark

24 curves · 1435 mm

Kamakura to Fujisawa tramway

Japan

24 curves · 1067 mm

Krefeld tramway

Germany

24 curves · 1000 mm

Nanjing tramway

People's Republic of China

24 curves · 1435 mm

Oklahoma City Streetcar

United States of America

24 curves · 1435 mm

Samsun tramway

Turkey

24 curves · 1435 mm

Cherepovets tramway

Russia

23 curves · 1524 mm

Cheryomushki tramway

Russia

23 curves · 1524 mm

Avignon tramway

France

22 curves · 1435 mm

El Paso Streetcar

United States of America

22 curves · 1435 mm

Milwaukee Streetcar (The Hop)

United States of America

22 curves · 1435 mm

Ploiești tramway

Romania

22 curves · 1435 mm

Salt Lake City tramway

United States of America

22 curves · 1435 mm

Seoul (Gimpo) tramway

South Korea

21 curves · 1435 mm

Stary Oskol tramway

Russia

21 curves · 1524 mm

Aubagne tramway

France

20 curves · 1435 mm

Malaga tramway

Spain

20 curves · 1435 mm

Ottawa tramway

Canada

20 curves · 1435 mm

Cleveland tramway

United States of America

19 curves · 1435 mm

Huai'an tramway

People's Republic of China

19 curves · 1435 mm

Mexico City tramway

Mexico

19 curves · 1000 mm

Mexico City tramway

Mexico

19 curves · 1000 mm

Ust-Kamenogorsk (Oskemen) tramway

Kazakhstan

19 curves · 1520 mm

Cincinnati Streetcar

United States of America

18 curves · 1435 mm

Fukui tramway

Japan

18 curves · 1435 mm

Novopolotsk tramway

Belarus

18 curves · 1524 mm

Salavat tramway

Russia

18 curves · 1524 mm

Seattle tramway

United States of America

18 curves · 1435 mm

Kochi tramway

Japan

17 curves · 1067 mm

Tel Aviv metropolitan area (Dankal) tramway

Israel

17 curves · 1435 mm

Vladivostok tramway

Russia

17 curves · 1524 mm

Fortaleza tramway

Brazil

16 curves · 1435 mm

Lund tramway

Sweden

16 curves · 1435 mm

Soller tramway

Spain

16 curves · 914 mm

Tacoma tramway

United States of America

16 curves · 1435 mm

Atlanta Streetcar

United States of America

15 curves · 1435 mm

New Taipei tramway

Taiwan

15 curves · 1435 mm

Frankfurt (Oder) tramway

Germany

15 curves · 1000 mm

Krasnoyarsk tramway

Russia

15 curves · 1524 mm

Little Rock Metro Streetcar

United States of America

15 curves · 1435 mm

Mainz tramway

Germany

15 curves · 1000 mm

Rio de Janeiro tramway

Brazil

15 curves · 1435 mm

Seville tramway

Spain

15 curves · 1435 mm

Mazyr tramway

Belarus

14 curves · 1524 mm

Zhytomyr tramway

Ukraine

14 curves · 1000 mm

Charlotte tramway

United States of America

13 curves · 1435 mm

Dallas Streetcar

United States of America

13 curves · 1435 mm

Jiaxing tramway

People's Republic of China

13 curves · 1435 mm

Kyoto tramway

Japan

13 curves · 1435 mm

Sapporo tramway

Japan

13 curves · 1067 mm

Shenzhen tramway

People's Republic of China

13 curves · 1435 mm

Tampa TECO Line Streetcar

United States of America

13 curves · 1435 mm

Calgary tramway

Canada

12 curves · 1435 mm

Dujiangyan tramway

People's Republic of China

12 curves · 1435 mm

Hódmezővásárhely tramway

Hungary

12 curves · 1435 mm

Kyoto to Otsu tramway

Japan

12 curves · 1435 mm

Utsunomiya to Haga tramway

Japan

12 curves · 1067 mm

Dijon tramway

France

11 curves · 1435 mm

Okayama tramway

Japan

11 curves · 1067 mm

Sanya tramway

People's Republic of China

11 curves · 1435 mm

Sassari tramway

Italy

11 curves · 950 mm

Buffalo tramway

United States of America

10 curves · 1435 mm

Guadalajara tramway

Mexico

10 curves · 1435 mm

Krasnoturinsk tramway

Russia

10 curves · 1524 mm

Mengzi tramway

People's Republic of China

10 curves · 1435 mm

Qiubei (Wenshan) tramway

People's Republic of China

10 curves · 1435 mm

Toyohashi tramway

Japan

10 curves · 1067 mm

Hakodate tramway

Japan

9 curves · 1372 mm

Tokyo tramway

Japan

9 curves · 1372 mm

Seoul tramway

South Korea

9 curves · 1435 mm

Volchansk tramway

Russia

8 curves · 1524 mm

Adelaide tramway

Australia

7 curves · 1435 mm

Beijing tramway

People's Republic of China

7 curves · 1435 mm

Beijing tramway

People's Republic of China

7 curves · 1435 mm

Dubai tramway

United Arab Emirates

7 curves · 1435 mm

Foshan tramway

People's Republic of China

7 curves · 1435 mm

Kenosha Streetcar

United States of America

7 curves · 1435 mm

Qingdao tramway

People's Republic of China

7 curves · 1435 mm

Shanghai tramway

People's Republic of China

7 curves · 1435 mm

Copenhagen tramway

Denmark

6 curves · 1435 mm

Foshan (Nanhai District) tramway

People's Republic of China

6 curves · 1435 mm

Novokuznetsk tramway

Russia

5 curves · 1524 mm

Bergamo tramway

Italy

4 curves · 1435 mm

Newcastle tramway

Australia

4 curves · 1435 mm

Tianshui tramway

People's Republic of China

4 curves · 1435 mm

Vienna-Baden tramway

Austria

3 curves · 1435 mm

Oberhausen tramway

Germany

3 curves · 1000 mm

Schwerin tramway

Germany

3 curves · 1435 mm

Changchun tramway

People's Republic of China

2 curves · 1435 mm

Duisburg tramway

Germany

2 curves · 1435 mm

Gold Coast tramway

Australia

2 curves · 1435 mm

Kitakyushu to Nogata tramway

Japan

2 curves · 1435 mm

Port Louis to Curepipe tramway

Mauritius

2 curves · 1435 mm

Shenyang tramway

People's Republic of China

2 curves · 1435 mm

Doha (Msheireb Downtown) tramway

Qatar

1 curves · 1435 mm

What the model reads

Geometry sets the risk. Conditioning decides the outcome.

A tight curve is not automatically a noisy one. A correctly conditioned network stays quiet through the same geometry that would otherwise squeal. So the atlas models risk, the likelihood of squeal from a network's shape, and leaves the outcome to how the interface is conditioned.

Track geometry

Curve radius and network layout, the physical shape that sets where squeal is most likely to arise.

Market data

Open network and operating data, combined with the geometry to model curve-squeal risk across a network.

Modelled, not measured

The atlas shows modelled risk, not measured results and not a claim about any named network. Risk is not the same as noise; conditioning decides that.

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