What might you expect when driving on expressways through large cities?

When driving on expressways through large cities, traffic can be unpredictable, and conditions can change rapidly. It is common for traffic to slow down suddenly due to various factors such as construction, accidents, or the high density of vehicles merging and exiting the highway. Urban environments often have a lot of movement, with vehicles merging from on-ramps and exiting to off-ramps, which can lead to unexpected slowdowns. Understanding this characteristic helps drivers remain vigilant and prepared to adjust their speed accordingly, enhancing overall safety on the road.

In contrast, the other options present unrealistic expectations. For example, traffic isn’t consistently smooth due to the nature of urban driving conditions. Expressways do have speed limits, which are enforced to maintain safety, so the idea that there are no speed limits is incorrect. Additionally, changing lanes can be challenging because of the heavy traffic typically found in cities, making it necessary for drivers to be cautious and patient.