SECTION OF URBAN RING HIGHWAY OF MEGAPOLIS Russian patent published in 2000 - IPC

FIELD: highway engineering, applicable in construction or reconstruction of road junctions at different grades of trunk highways in the conditions of narrow urban building. SUBSTANCE: the section of urban ring highway of megapolis comprises a vehicular traffic tunnel connected through an overground section at least to one road junction of the ring highway with a radial highway. The novelty is in the fact that the tunnel connected through an overground section at least to one road junction of the ring highway with a radial highway. The novelty is in the fact that the tunnel is positioned in the axis of the ring highway and made in length with two sections curvilinear in plan, facing the opposite sides with the convex part, and formation of the middle rectilinear section located between them, and rectilinear terminal sections; the angle between the axis of one rectilinear terminal section and the axis of the middle rectilinear section makes up 39 to 47 deg., and the angle between the axis of the other rectilinear terminal section and the axis of the middle rectilinear section makes up 23 to 31 deg., the junction of the ring and radial highways is made in the form of an overpass arranged in the axis of the ring highway, whose roadway is conjugated with the roadway of the tunnel ramp through the roadway of the overground section. EFFECT: reduced labour and material costs and scope of excavation in the conditions of narrow urban building, presence of neighboring historical and architectural monuments and numerous underground neighboring service lines at simultaneous provision of a high traffic capacity and road safety, prevented jammings on motor roads, deformations of overground structures, and improved ecology. 13 cl, 11 dwg