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Rigid pavement can be constructed with contraction joints, expansion joints, dowelled joints, no joints, temperature steel, continuous reinforcing steel, or no steel. Most generally, the construction requirements concerning these options are carefully chosen by the owner or the public entity that will be responsible for future maintenance of the pave­ment. The types of joints and […]

Aric A. Morse, P. E. Pavement Design EngineerOhio Department of TransportationColumbus, Ohio Roger L. Green, P. E. Pavement Research EngineerOhio Department of TransportationColumbus, Ohio The movement of people and goods throughout the world is primarily dependent upon a transportation network consisting of roadways. Most, if not all, business economies, personal economies, and public economies are […]

Typical highway construction plans are made up of several individual components. The paragraphs that follow will present a brief discussion of various types of plan sheets that make up a set. Except for major projects, seldom will all of the compo­nents be required in a plan. However, when required, they are usually placed in the […]

As an example of the use of CADD files and design software, the Ohio Department of Transportation (ODOT) has stated that this is the preferred method of preparing plans. ODOT has adopted MicroStation and GEOPAK as its standard drafting and design software (Ref. 8). (Note: The preferences mentioned here are those used by ODOT and […]

2.14.1 Plan Preparation The purpose of a set of highway construction plans is to delineate the proposed work with sufficient design details, supplemented with notes, calculations, and summary of quantities, so that it can be clearly and uniformly interpreted by engineers and con­tractors (Ref. 8). Sufficient data must be provided to enable the contractor to […]

There are two general categories of HOV lanes for use on surface arterial streets: (1) those which assign exclusive use of designated lanes for HOV use and (2) those which give FIGURE 2.63 Cross sections for high-occupancy-vehicle two-way separated lanes on separated roadway. Conversion: 1 ft = 0.305 m. (From Guide for the Design of […]

There are three types of HOV lane patterns—separated lanes, concurrent flow lanes, and contraflow lanes. Regardless of which pattern is chosen, consideration should be given to traffic operations at interchanges and on-ramps, pedestrian access to on-line stations, the availability of parking areas at or near the stations, and the possible use of HOV lanes during […]

Management of HOV facility operations may be accomplished by a range of techno­logical and personnel means. Minimum control may consist of passive signing and delineation. Maximum control may involve sophisticated surveillance, vehicle detection with computer integration, and dynamic, real-time signing or delineation. A determination of the level of vehicle restriction must be made on the […]

Another method that is being increasingly used to relieve congestion on urban free­ways is the establishment of high-occupancy vehicle (HOV) lanes. Although the first instances of use in California in the early 1970s met with much public resistance, the idea was revisited and accepted more readily during the mid-1980s and continues to grow in acceptance […]

Intelligent vehicle highway systems (IVHS) refers to transportation systems that involve integrated applications of advanced surveillance, communications, computer, display, and control process technologies, both in the vehicle and on the highway (Ref. 5). In 1991, Congress passed the Intermodal Surface Transportation Efficiency Act (ISTEA), which included an authorization of $660 million to create an IVHS […]