What is the speed limit for trains handling cars loaded with continuously welded rail through truss bridges?

When handling cars loaded with continuously welded rail through truss bridges, the speed limit is established at 10 mph to ensure safety and structural integrity. Truss bridges are designed to distribute loads effectively, but the nature of the cargo, specifically continuously welded rail, can impose significant stress on the bridge structure. The reduced speed limit allows for careful monitoring of the performance of the bridge under these conditions, minimizing the risk of structural failure or adverse effects on the load being transported. This practice is a safety precaution, aimed at preventing derailing or damage to both the rail and the bridge itself during transit.