Yellow Line
- Abuja Light Rail
- BMT Broadway Line
- Barcelona Metro line 4
- Bucharest Metro Line M1
- Circle Line (Singapore)
- Circle line (London Underground)
- Circular line (Taipei metropolitan area)
- E Line (Los Angeles Metro)
- Gaza peace plan
- Gold Line (MARTA)
- Incheon Airport Maglev
- KA Commuter line Jatinegara–Bogor
- Kalininsko-Solntsevskaya line
- L Line (Los Angeles Metro)
- L Line (RTD)
- Line 1, Guangzhou Metro
- Line 13, Beijing Subway
- Line 3 (Daegu Metro)
- Line 3 (Madrid Metro)
- Line 3, Shanghai Metro
- Line 4 (Rio de Janeiro)
- Line 4 (São Paulo Metro)
- Line 4 of the Guadalajara urban rail system
- Line B (Prague Metro)
- Line M3 - Milan Subway (Metropolitana di Milano)
- M2 (Copenhagen)
- MAX Yellow Line (TriMet)
- MBTA bus
- MRT Line 3 (Metro Manila)
- Metro Gold Line (Minnesota)
- Mexico City Metro Line 5
- Mexico City Metrobús Line 4
- Millennium Line
- RER C
- Sheffield Supertram
- Suin-Bundang Line
- Tokyo Metro Yūrakuchō Line
- Tyne and Wear Metro
- U4 (Berlin U-Bahn)
- Yellow Bus Line
- Yellow Flag Line
- Yellow Line (Ahmedabad Metro)
- Yellow Line (BART)
- Yellow Line (Baltimore)
- Yellow Line (Bangkok)
- Yellow Line (CTA)
- Yellow Line (Delhi Metro)
- Yellow Line (Gaza)
- Yellow Line (Kolkata Metro)
- Yellow Line (Lisbon Metro)
- Yellow Line (Montreal Metro)
- Yellow Line (Mumbai Metro)
- Yellow Line (Namma Metro)
- Yellow Line (Rio de Janeiro)
- Yellow Line (Washington Metro)
- Yellow N Line
- Yellow Q Line
- Yellow R Line
- Yellow W Line
- Yellow line (Kaohsiung MRT)
- Yellow line (road marking)
- Yonge–University–Spadina line