BRT on Expressways

Shoulder Riding
In addition to Arterial BRT, BRT can exist along expressways. For instance, buses can use shoulder lanes to by-pass slow traffic, thus reducing their travel time and staying on schedule. Shoulder riding is one of the most affordable options for implementing BRT on expressways/interstate highways/tollways because it is less expensive to modify shoulders than it is to construct new roadways. BRT on bus-only shoulders increases the reliability and attractiveness of public transportation.

Ramp Metering By-pass Lanes
In addition to bus-only shoulders, ramp metering is an effective method of enabling a bus to by-pass waiting traffic. A ramp meter is a traffic signal that controls the flow of traffic onto expressways based on the number of vehicles already on the roadway. Ramp metering, with queue jump lanes for buses, allows buses to proceed ahead of other traffic as they use ramps to enter expressways. While cars are waiting for a green signal to move onto the expressway, buses use the queue jump lane to by-pass waiting traffic.