What can cause you to get hung up on railroad tracks?

Getting hung up on railroad tracks can occur due to a steep approach to the tracks. When the angle of the approach is steep, it can create a situation where the vehicle, especially if it is a larger one, may have difficulty transitioning onto or off of the tracks. This can lead to the vehicle's wheels becoming stuck, especially if the vehicle's ground clearance is low or if it is heavily loaded.

The other options present scenarios that may increase the risk of getting into trouble when crossing tracks but do not directly lead to getting hung up in the same way. For instance, trying to shift gears while crossing can distract from navigating the crossing safely, but it’s not specifically about being stuck. Crossing double tracks too slowly could also be unsafe, but again, it doesn’t directly relate to being stuck; it's more about maintaining an adequate speed to clear the tracks. The length of the vehicle presents challenges at crossings, but it's the steepness of the approach that is the primary cause of being hung up on the tracks as it affects the vehicle's ability to navigate the transition effectively.