A merge lane (also called an acceleration lane) is a roadway section where vehicles entering from an on-ramp accelerate and blend into the main traffic flow. Merge lanes allow entering vehicles to reach highway speeds before joining traffic, improving safety and flow. Proper merge lane design provides adequate length for acceleration and clear sight lines for drivers to judge gaps in traffic. Municipal and provincial transportation departments design merge lanes according to engineering standards based on expected speeds and traffic volumes. Driving in merge lanes requires matching speed with traffic and yielding to vehicles already on the highway while finding a safe gap to enter.