Pak128 Unmodified.
This fully loaded train is pulling away from a station on straight and level track. I doubt it will reach 30kp/h before it passes over the bridge.
Would it accelerate any faster if the bridge was better quality?
Locomotive: JNR-SL C11 = Top speed 73kp/h
Wagons: RVG Bulk = Top Speed 50kp/m
Station Track: Low Quality = Top Speed 65kp/h
Bridge: Wooden = Top Speed 30kp/h
(http://img851.imageshack.us/img851/7574/simscr03.th.png) (http://imageshack.us/photo/my-images/851/simscr03.png/)
Nope, track quality just puts a limit on the maximum speed, not at the acceleration.