Structure gauge
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A structure gauge, also called the minimum structure outline, is a diagram or physical structure that sets limits to the extent that bridges, tunnels and other infrastructure can encroach on rail vehi
In narrow curves, long cars like this 26.4 m (86 ft 7 in) long express train car protrude further into the gauge than on a straight track. (180° curve near Königstein im Taunus)
Bridge strike
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Bridge strike or tunnel strike is a transport accident in which a vehicle collides with a bridge, overpass, or tunnel structure. Bridge-strike road accidents, in which an over-height vehicle collides
Bridge strike in Brisbane, Australia
Stabilizing frame installed as a temporary repair of a bridge strike
I-5 Skagit River bridge collapsed
Low clearance warning sign that is hard to see