Road structure – process – or apparatus – Road system
Patent
1987-12-11
1989-08-29
Massie, Jerome W.
Road structure, process, or apparatus
Road system
E01C 100
Patent
active
048611840
ABSTRACT:
A continuous flow cloverleaf type interchange for accommodating traffic from a plurality of road surfaces which includes a first road surface for traffic traveling in a first direction, a second road surface for traffic traveling in a direction opposite to the first direction, a third road surface for traffic traveling in a direction intersecting the first and second road surfaces, and a fourth road surface for traffic traveling in a direction opposite to the traffic traveling on the third road surface. The first and second road surfaces intersect and are disposed at a first elevation distinct relative to the third and fourth road surfaces in an area adjacent to an interchange. The first road surface left turn lane diverts traffic from the first road surface to cross the second road surface prior to the interchange and to continue traveling in a direction opposite to the second road surface in an area displaced laterally from the first road surface. At least one substantially circular cloverleaf section diverts traffic from the fourth road surface to merge with traffic from the second road surface. The first road surface left turn lane curves along the cloverleaf section to turn left without stopping and to merge from the right with traffic traveling along the fourth road surface without weaving.
REFERENCES:
patent: 2946267 (1960-07-01), Cedeno
patent: 2949067 (1960-08-01), Cedeno
patent: 3107590 (1963-10-01), Cedeno
patent: 4630961 (1986-12-01), Hellwig
"A Policy on Geometric Design of Rural Highways" published by the American Association of State Highway Officials, 1954.
"A Policy on Geometric Design of Urban Areas", published by the American Association of State Highway Officials, 1957.
Massie Jerome W.
Spahn Gay Ann
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