Double-framed "H" form non-stop roadway interchange

Details Double-framed "H" form non-stop roadway interchange Double-framed "H" form non-stop roadway interchange

1985-03-15

1986-06-03

Leppink, James A.

Road structure, process, or apparatus

Road system

E01C 104

Patent

active

045926735

ABSTRACT:
A traffic flow distribution interchange that provides non-stop and streamlined flow of freeway traffic along two crossing routes, and that occupies a relatively small amount of land area. The freeway interchange comprises a non-elevated route and an elevated crossing route which passes over the non-elevated route. Each route is substantially straight and provides traffic flow in two directions. The elevated and non-elevated routes are linked directly by four traffic flow paths along which vehicles can make right-hand turns from one route to the other. The elevated and non-elevated routes are linked indirectly by four additional traffic flow paths comprising configured ramps along which vehicles can make left-hand turns from one route to the other. These configured ramps pass under the elevated route and cross each other, providing unimpeded traffic flow.

REFERENCES:
patent: 3107590 (1963-10-01), Cedeno
patent: 3386351 (1968-06-01), Hara
patent: 3394638 (1968-07-01), Burrell
patent: 3847496 (1974-11-01), Stankiewicz
A Policy on Arterial Highways in Urban Areas, American Association of State Highway Officials, Fig. J-19-a-, p. 511, copyright 1957.

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