An on-ramp is a roadway section allowing vehicles to enter and join higher-speed traffic on highways or expressways. On-ramps typically include acceleration lanes where entering vehicles can reach highway speeds before merging with through traffic. Proper on-ramp design considers sight distances, acceleration space, and merge area length based on highway speeds and traffic volumes. Municipal and provincial transportation departments design on-ramps according to engineering standards. Safe on-ramp use requires drivers to accelerate to match traffic speed, signal intentions, and merge smoothly. On-ramp congestion during peak periods affects highway system performance and travel times.