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Unformatted text preview: Warrants: As part of an express highway system designed to carry volumes of traffic To eliminate bottlenecks To prevent accidents Where the volume to be catered for would require the design of an intersection at grade of unreasonable size Where the road user benefit of reducing delays at an at-grade intersection > improvement cost Types T and Y interchanges: Trumpet for solving left turn on the freeway Diamond Interchanges Partial and full cloverleafs Directional Interchanges 3. Design of Ramps and Turning Roadways See Caltrans design manual in terms of maximum grade, minimum radius of ramp curve, width and exit and entrance connection to freeway. 4. Railroad Grade Intersections Warrants: All mainline railroads (two or more trucks /single line tracks with six or more trains per day. 5. Design of Parking Facilities Will be discussed in CE223. Here forget it. Homework: 1) Why is the interchange design B (figure 9-8) better than design A (figure 9-8)?...
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- Winter '09