What is the name of the lanes designed to help vehicles reach freeway speeds?

The correct choice identifies an acceleration lane as the specific lane designed to aid vehicles in reaching the necessary speeds to merge safely onto a freeway. Acceleration lanes are located on the entrance ramps to highways and freeways and serve a crucial function in traffic flow. They allow drivers to gradually increase their speed before entering the main highway traffic, reducing the likelihood of abrupt stops or collisions as vehicles merge. This transitional area is essential for maintaining safety and efficiency on high-speed roadways.

The other options refer to different types of lanes with distinct purposes; for instance, deceleration lanes are meant for vehicles to slow down before exiting a freeway, merge lanes are used for bringing traffic from two lanes into one, and turn lanes facilitate vehicles making left or right turns without obstructing the flow of through traffic. Each of these lane types plays a vital role in traffic management but does not serve the specific function of helping vehicles accelerate to freeway speeds.