chapter8 - CE222 Highway Engineering Notes for Chapter 8...

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CE222 Highway Engineering Notes for Chapter 8 Roadway Design 1. Roadway Environment Run-Off-Road accidents are subjected to the use of restraint systems by vehicles occupants, type of vehicle and the nature of the roadside environment. Highway designers ---- roadway environment 2. Clear Roadway Recovery Areas Generally speaking, 30 ft from the traveled way (85percent of the vehicles run off the roads can avoid accidents. Detail clear zone distances need to be calculated using Table 8-1( meters) on page 224 or Table 8-1a (feet) on page 669. 3. Figure 8-2. Understand three concepts: Recoverable slopes 4: 1 or flatter Non-recoverable slopes 3:1 to 4:1 Critical slopes: 3:1 or steeper 4. Ditches and Drainage Structures Ditches: Learn the use of Figure 8-3 and Figure 8-4 Drainage structures: Curbs, Cross-Drains and parallel drainage structures 5. Breakaway sign and luminaire supports Breakaway support: all types of sign, luminaire, and traffic signal supports that are designed to break or yield when struck by a vehicle.
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This note was uploaded on 02/09/2009 for the course CE 222 taught by Professor Jia during the Winter '09 term at Cal Poly Pomona.

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chapter8 - CE222 Highway Engineering Notes for Chapter 8...

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