chapter6 - CE222 Highway Engineering Notes for Chapter 6...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
CE222 Highway Engineering Notes for Chapter 6 Traffic Characteristics 1. Traffic Flow Characteristics Traffic on a roadway is considered as a flow just like water flowing in a pipeline or a river. This assumption is not accurate but realistic in highway engineering. An understanding of traffic flow characteristics is very important for highway design. Parameters measuring traffic flow: Traffic Speed, Travel Time, Volume, Density, and Capacity 1) Traffic Speed and travel time Keep in mind the speed and travel time here are related to traffic FLOW. Speed: Spot speed: Instantaneous speed of a vehicle MPH or KM/H Measuring equipment: laser gun Time-mean speed: Equation 6-1 on page 132 Space-mean speed: Equation 6-2 on page 132 Relation between time-mean speed and space-mean speed: See Equation 6-3 Spot speed is related to an individual vehicle in the traffic flow. Time-Mean speed and space-mean speed are measures obtained from a sampling set of vehicles in the traffic flow. Overall speed
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 3

chapter6 - CE222 Highway Engineering Notes for Chapter 6...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online