Express lane

The local-express lane (also called collector–distributor lanes within a single interchange) system is an arrangement of carriageways within a major highway where long distance traffic can use lanes with fewer interchanges compared to local traffic which use 'local' or 'collector' lanes that have access to all interchanges. Where highway ramps between express and local/collector lanes cross over another this is commonly known as braided ramps.

Given the considerable overall width of this design, new suburban freeways are often designed with interchanges spaced far enough apart to avoid the need for parallel roadways.

A view of North Access's Freeway at Buenos Aires, Argentina from the bridge on Pres H.Yrigoyen street at Florida, Buenos Aires, Argentina

Express (cars only) and local (all vehicles) setup along Interstate 95 in Monroe Township, New Jersey.

Express to collector transfer on Highway 401.

M20 motorway near Maidstone, England, showing separated local express lanes.

Local-Express lanes on Interstate 270 in Montgomery County, Maryland.

Collector-Express roadway configuration on Highway 401 in Toronto.

A cloverleaf interchange may have collector–distributor lanes on a freeway or expressway to handle entering and exiting traffic. Usually, this lane will begin as an entrance-only ramp initially, but it will sometimes become a main lane or possibly an exit-only lane. The purpose of this lane is to facilitate traffic to the freeway exits and from the freeway entrances.

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Wikipedia