Split-traffic interchange

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A diagram of a split-traffic interchange. Traffic attempting to travel north on the blue road can enter from either ramp 'X' or ramp 'Y.' The hitchhiker must choose which ramp to stand on without being exposed to traffic on the other ramp.

A split-traffic interchange is any variation of an interchange in which opposing traffic is split between multiple on-ramps to go in the same direction upon entering a highway. These interchanges will typically have six or eight ramps. This is in contrast to the classic four-ramp interchange which requires all traffic to enter from a common ramp, giving the hitchhiker more exposure.

Split-traffic interchanges are the norm when two freeways or turnpikes intersect, but they become a problem for the hitchhiker when they are built at the interchange of a regular highway or roadway. These interchanges prevent traffic with a common directional goal on an intersecting highway from entering on the same ramp. Because of this, the hitchhiker must decide between two ramps to a highway without being exposed to traffic entering on the opposite ramp.

It is recommended upon coming to a split-traffic interchange that you count the number of cars entering each ramp in a given time period to determine which ramp has the most traffic and thus which ramp will be the best for catching a ride. It is also wise to inspect a road map to consider where traffic entering each ramp is coming from and where they are likely headed.