Final answer:
An enter ramp is located on the right side of the road and allows vehicles to enter the expressway. An exit ramp is located on the left side of the road and allows vehicles to exit the expressway. By paying attention to the positioning and direction of the ramp, you can determine whether it is an enter ramp or an exit ramp.
Step-by-step explanation:
When preparing to enter an expressway, you can distinguish between an enter ramp and an exit ramp based on their position in relation to the direction of travel on the expressway.
An enter ramp is located on the right side of the road and allows vehicles to enter the expressway from a surface street or another road. The enter ramp merges with the main traffic flow on the expressway.
In contrast, an exit ramp is located on the left side of the road and allows vehicles to exit the expressway and transition to a surface street or another road.
By paying attention to the positioning and direction of the ramp, you can determine whether it is an enter ramp or an exit ramp.