BRT on Expressways
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
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.