Guide to road design part 4C: interchanges

The Guide to Road Design Part 4C: Interchanges provides guidance on the geometric design of interchanges on freeways/motorways and on major arterial roads. The Guide covers the design of interchanges between: freeways and arterial roads; two freeways; and two major arterial roads. It covers the geometric design of all the elements of an interchange including the: alignment and cross-section of the freeway in the vicinity of the interchange, the intersecting road and the ramps; merge and diverge ramp terminals at the freeway; and ramp terminals at the intersecting road.