Simplified "T" interchange designs for a "T" intersection of a divided expressway or freeway with a two lane highway

Abstract

A simplified “T” interchange design is provided for an intersection of a four lane expressway with a two lane highway. The design uses one, short, two lane bridge over two lanes of traffic. The design would be very inexpensive to build when compared to the cost to build a conventional interchange. The design would be very safe for vehicles passing through the interchange from any direction. Vehicles are never required to cut across lanes of high speed traffic when making transitions between the two lane highway and the expressway.

Description

[0001] This application claims priority to U.S. Provisional Application No. 60 / 427,868 filed on Nov. 19, 2002 which for purposes of disclosure is incorporated herein by specific reference.BACKGROUND OF THE INVENTION [0002] Most people are familiar with the interstate freeway system in the United States. The four lane interstate highway system interconnects all of the states. The standard design of this interstate system provides safe divided highways with at least two lanes of traffic in opposite direction. Where the interstate system intersects two lane highways such as state highways or county highways, an over-pass bridge is always provided so that traffic never cuts in front of each other on the same level. Additionally, “off ramps” are always provided so that vehicles can safely make the transition off of the freeway and onto the intersecting highways. Also, “on ramps” are always provided so that vehicles can make the transition from the intersecting two lane highways onto the ...

AI Technical Summary

Benefits of technology

[0011] It is another object of the invention to provide simplified “T” interchange design for a “T” intersection of a divided expressway or freeway with a two lane highway that would be very inexpensive to build when compared to the cost to build a conventional interchange. The simplified “T” interchange design could be built for approximately 20% to 25% of the cost of a traditional interstate interchange.

[0019] It is another object of the invention to provide simplified “T’interchange design for a “T” intersection of a divided expressway or freeway with a two lane highway that would allow a lot of vehicles to be backed at the interchange and not create a hazard to other lanes of traffic.

Problems solved by technology

However, there have been a lot of accidents at some of the intersections.

The main cause of the accidents are because of the lack of overpass bridges and “on ramps and off ramps”.

Also, the highway departments spend what money they have on what they feel are the most important problems in their highway districts.

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