Which of the following statements regarding driving over bridges is true?

Driving over bridges can present specific challenges, which is why the statement highlighting that they can be crowded, have limited visibility, and lack shoulder space is accurate.

Bridges are often locations where vehicles may encounter reduced space, particularly in heavy traffic, leading to congestion. This can significantly impact visibility, especially if there are vehicles closely following or if obstacles are present that obstruct the driver's line of sight. In many cases, bridges do not have ample shoulder areas, which means that drivers have less room to maneuver or react to emergencies, making caution necessary when navigating these structures.

The other statements about bridges do not hold up as general truths. While bridges can vary widely in design and traffic conditions, it is not accurate to say they are always clear and safe to drive over. Furthermore, many bridges accommodate heavy vehicles, and while dedicated truck lanes may exist on some roads, they are not a common feature of all bridges. Understanding these factors is crucial for safe driving in these situations.