مدرس المادة
The determination of level of service for a multilane highway involves three steps:
- Determination of free-flow speed
- Determination of flow rate
- Determination of level of service
FREE-FLOW SPEED:
Free-flow speed is the theoretical speed of traffic density, when density approaches zero. It is the speed at which drivers feel comfortable travelling under the physical, environmental and traffic conditions existing on an uncongested section of multilane highway. In practice, free-flow speed is determined by performing travel-time studies during periods of low-to-moderate flow conditions. The upper limit for low to moderate flow conditions is considered 1400 passenger cars per hour per lane (pc/h/ln) for the analyses.
تحميل الملف