Designated lanes prioritize vehicles carrying multiple occupants, aiming to enhance traffic flow and encourage carpooling. These specialized roadways, often marked with distinctive signage and symbols, are typically reserved for vehicles with a minimum number of passengers, such as two or three. A practical example is a lane on a heavily congested freeway that allows vehicles with two or more occupants to bypass slower-moving traffic, thereby reducing travel time.
The rationale behind this infrastructure lies in its potential to alleviate traffic congestion, reduce emissions, and promote more efficient use of transportation resources. Historically, the implementation of these systems has been driven by growing urbanization and the associated challenges of managing increasing vehicle volumes. By incentivizing shared transportation, such routes contribute to a decrease in the overall number of vehicles on the road during peak hours. This also offers an economic benefit to commuters by reducing fuel consumption and wear on private vehicles.