Lightpainting and urban scenes are commonly considered not to mix. The complications are many, from relatively simple matters of colour balance to more complex compromises between exposure duration and ambient brightness- the longer you expose your image, the brighter it gets.
The challenge is controllable if you're prepared to embrace post processing techniques, in particular compositing several frames for lighting. This final image consists an ambient frame for the background & car's shadow; lighting the nearside of the car; lighting from behind the car; the car's headlights/ tail lights; and the foreground light trails, added in by another car in our group. The silver paintwork illuminates pretty well, allowing my light to make an impression even at ISO200 & f/11. Dialling in that sensitivity gave me an exposure time of 15 seconds- plenty long enough when shooting with layering in mind.
We started shooting with the freight train static in the background. Over the few minutes of various lighting frames, the train completed its stop and began moving. A quick adjustment of settings to ISO400 and f/5.6 for 2 seconds- the same ambient brightness over a shorter exposure time- allowed me to capture the movement of the carriages in a final frame.