Topic 502 - Interchange Types

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HIGHWAY DESIGN MANUAL 500-1 July 1, 2015 CHAPTER 500 TRAFFIC INTERCHANGES Topic 501 - General Index - Concepts A traffic Interchange is a combination of ramps and grade separations at the junction of two or more highways for the purpose of reducing or eliminating traffic conflicts, to improve safety, and increase traffic capacity. Crossing conflicts are reduced by grade separations. Turning conflicts are either eliminated or minimized, depending upon the type of Interchange design. Warrants All connections to freeways are by traffic interchanges. An Interchange or separation may be warranted as part of an expressway (or in special cases at the junction of two non-access controlled highways), to improve safety or eliminate a bottleneck, or where topography does not lend itself to the construction of an intersection.

Jul 01, 2015 · interchange types are not acceptable. (c) Cloverleaf Interchanges--The simplest cloverleaf interchange is the two-quadrant cloverleaf, Type L-7 or Type L-8, or a combination where the two loops are on the same side of the cross street. Type L-7 eliminates the need for left-turn storage lanes, on or under the structure, thus reducing the

  Loops, Types, Interchange, Interchange types