The Correct Answer and Explanation is:
The correct answer is d) All of the above.
Expressways are engineered for high-speed, efficient travel, and their rules are designed to maximize safety by ensuring a continuous and predictable flow of traffic. The maneuvers listed in the options are all strictly prohibited because they disrupt this flow and create extremely dangerous situations.
First, turning on an expressway is not permitted. This includes U-turns, which are explicitly illegal. The high velocity of vehicles means that a car attempting to turn around would create a sudden, unexpected obstacle, giving other drivers almost no time to react and likely causing a severe multi-car collision. To change direction, drivers must use the system of designated interchanges and exits, which are designed to allow for safe merging and diverging from traffic without stopping or turning against the flow.
Second, crossing the grassy median is forbidden. The median’s primary purpose is to physically separate opposing lanes of high-speed traffic, acting as a critical safety buffer to prevent head-on collisions, which are among the most fatal types of accidents. Driving across the median would place a vehicle directly in the path of oncoming traffic. This space is reserved for authorized emergency and maintenance vehicles only, which use it under controlled conditions.
Third, stopping on the traveled portion of an expressway is prohibited. A stationary vehicle in a lane of traffic traveling at 55 miles per hour or more is a recipe for disaster, as it dramatically increases the risk of a high-impact rear-end collision. Drivers should only stop on the shoulder of an expressway for a genuine emergency, such as a vehicle breakdown, a medical issue, or to avoid an immediate hazard. The shoulder is not a parking area for non-emergency activities.
Since all three actions, turning, crossing the median, and stopping, are dangerous and illegal on expressways, the correct answer is that all of them are prohibited.
