The invention belongs to the technical field of interchange, in particular to an eight-way interchange. The following technical scheme is proposed, comprising a first forked road, a third forked road, a second forked road, a fourth forked road, a fifth forked road, a sixth forked road, a seventh forked road and an eighth forked road. The first forked road and the third forked road, the second forked road and the fourth forked road constitute a cross overpass, the first forked road and the third forked road constitute an upper two-way straight lane, the second forked road and the fourth forked road constitute a lower two-way straight lane. The invention has simple structures. Motor vehicles can complete straight driving, left turn, right turn and U-turn through upper straight two-way lanes, lower straight two-way lanes and eight right-turn lanes, realizing the interconnection of all eight forked roads in 16 traffic directions.

A method and apparatus for forming a tunnel structure at a relatively shallow depth from the surface, which tunnel can be used as a replacement or additional transport route to an existing transport route (2) which is already formed on the surface. The method comprises the steps of forming two spaced apart access tunnels, installing piles (15), installing slide tracks (17) in each of the tunnels, removing a part of the tunnels (hatched portion) to expose the tracks, introducing units (22) comprising side walls portions (26, 28) and a roof section (30) by moving the units along the tracks while excavating the soil in which the tunnel is to be formed is in advance of the leading edge of the units.

A non-transitory computer readable recording medium has stored therein a program that causes a computer to execute a process including displaying a screen on which it is possible to set an area affected by a characteristic of a road around a specific facility, which is the area set based on the facility; and displaying, on a graphic, information specifying a section of road that is contained in the area affected by the characteristic relating to the specific facility on the displayed screen and that is affected by a possible selected type of repair work on the road according to the fact that the section belongs to the affected area.

A method for relieving vaulted expansion of a cement-stabilized base layer through precut seams. The method firstly establishes an RBFN model according to a large number of observation results of a vaulted expansion amount of the cement-stabilized base layer under different conditions (such as temperature and a stress release structure) in Xinjiang and similar regions; and on such a basis, the vaulted expansion amount of the cement-stabilized base layer to be designed is predicted. When the vaulted expansion amount is greater than a control requirement, the RBFN model is configured to design a reasonable width and a reasonable interval of the precut wide expansion seams to ensure that the vaulted expansion amount of the cement-stabilized base layer is less than a control value. Based on the design of the RBFN model, the present invention provides a corresponding construction method for the precut wide expansion seams. The present invention can predict the vaulted expansion of the cement-stabilized base layer without precut seams according to existing data.

The present disclosure provides new transportation design methods and a system that can improve road capacity, throughput, and travel safety as well as facilitate the current and future development of autonomous driving. The new methods and system basically eliminate all potential stopping, slowing down, and traditional crossing intersections in traffic. By mosaicking variously sized and shaped one-way loops in two-dimension and a myriad of ways and levels, the new design and system generally reduce possibilities of road accidents and utilization, reduce city pollution and improve energy efficiency, as well as encourage ride sharing and public transportation. The new design can always be compatible with existing streets and support progressive construction in phases at a controllable cost so it is practical in implementation.

A present invention relates to a composite road module, unit and system. The composite road module comprising a first road and a second road extending substantially in parallel, one of the first road and the second road being configured for vehicles to travel according to a left-hand traffic rule, the other being configured for vehicles to travel according to a right-hand traffic rule, the first road comprising a first lane and a second lane, the second road comprising a third lane and a fourth lane, wherein the first lane and the third lane are in communication with each other, and are provided for vehicles to travel in a first direction, and wherein the second lane and the fourth lane are in communication with each other, and are provided for vehicles to travel in a second direction opposite to the first direction.

A road network balanced drainage method aimed at reducing urban waterlogging is disclosed. According to the drainage demand, the existing intersection elevation is changed or the intersection elevation that meets the drainage requirement is designed and implemented in new construction so that the intersection drainage is distributed according to the desired proportion; the water flowing to the water accumulation position is transferred to reduce the waterlogging degree. Through the analysis of the depth of water accumulation in the whole road network, the method of water flow distribution at the intersection is used to make the precipitation flow evenly distributed in the whole road network. The method can be used for solving serious water accumulation of a certain road section, the balanced drainage of the whole road network, the technical transformation of existing intersections, and for the planned and designed roads. The method can effectively eliminate and prevent urban waterlogging.

An elevated roadway for autonomous vehicles may include a pylon extending vertically from a ground anchor and comprising a metal tube defining a central cavity and a concrete column within the central cavity. The elevated roadway further includes a bracket coupled to the pylon and comprising a mounting plate secured to the pylon and a cantilevered road support member extending from the mounting plate. The elevated roadway may further include a cantilevered road section coupled to the pylon via the cantilevered road support member and comprising a joist structure structurally coupled to the cantilevered road support member, a road member above the joist structure and supported by the joist structure, and first and second side barriers along first and second sides of the road member, respectively. The road member may be adapted to receive a four-wheeled roadway vehicle.

A construction and/or installation method for using phosphogypsum in embankment improvement includes preparing a phosphogypsum-containing embankment mixture, setting moisture content of an embankment mixture, paving a modified phosphogypsum-containing embankment, and reversely layering anti-seepage cushion layers from two sides of the embankment to the center of the embankment. The preparation of a phosphogypsum-containing embankment mixture can include the following: 90 parts by weight of phosphogypsum and 10 parts by weight of cement are weighted, uniformly mixed and stirred to obtain a base material mixture; and 2-4 parts by weight of sodium silicate is weighted and dissolved in water, and an obtained solution is added to the base material mixture to obtain the phosphogypsum-containing embankment mixture. The construction and/or installation method for using phosphogypsum in an embankment improvement can satisfy embankment strength and rebound modulus requirements, and can be widely applied to a filling-deficient area and an area with a relatively high yield of phosphogypsum solid wastes.

Systems and methods are provided for obtaining vehicle operating conditions at or near a section of roadway in order to determine whether existing/current roadway infrastructure at or near that section of roadway is causing a loss in operating efficiency. Vehicle operating conditions may be communicated by vehicles to roadside units via a vehicle-to-infrastructure communications system. Upon a determination that the existing/current roadway infrastructure is causing the loss in operating efficiency, one or more recommendations for improvements to the existing/current roadway infrastructure may be suggested to a municipality controlling the section of roadway. Estimates regarding the effectiveness of the improvements as well as actual measurements regarding implemented improvements may be determined in order to justify proceeding with implementing the improvements and/or generate additional improvement recommendations.