What should you do at a railroad crossing without signals?

At a railroad crossing without signals, it is essential to slow down and look for trains before crossing because safety is the top priority. This action allows drivers to adequately assess the situation and check for any oncoming trains that may not be immediately visible.

The absence of signals means there are no lights or gates to indicate the presence of a train, heightening the risk involved in crossing. By taking the time to slow down and actively look for trains, drivers can make a more informed decision about whether it's safe to cross. This practice emphasizes the importance of caution at such crossings, which could be a site of serious accidents if not approached properly.

Other options, such as stopping and waiting for instructions, might not be practical since there is typically no personnel present to provide guidance. Speeding up to cross quickly poses a significant danger, as it reduces the time available to notice an approaching train. Only crossing if no cars are visible also fails to prioritize the crucial step of looking for trains, which could lead to tragic consequences. Overall, the correct answer aligns with the fundamental principle that driving safety involves being vigilant and aware of potential hazards.