What is the purpose of a slip road?

The purpose of a slip road is to facilitate joining or leaving a main road. Slip roads, also known as merge lanes or deceleration lanes, are designed to provide a smooth transition for vehicles entering or exiting major roadways, such as highways or motorways. This design helps to minimize disruption to the flow of traffic on the main road by allowing vehicles to accelerate or decelerate safely without interfering with the speed of other vehicles.

The presence of slip roads enhances road safety and reduces the likelihood of accidents, as they offer dedicated space for vehicles to merge into or out of traffic. This is especially important on high-speed roads where sudden stops or lane changes can be hazardous.

In contrast, options referring to parking, emergency vehicle access, or pedestrian crossing do not align with the primary function of a slip road, which is specifically aimed at merging and exiting the main traffic flow.