Factors affecting PCU
- Size – the length and width of the vehicle.
- Speed under the prevailing roadway and traffic.
- Environmental and climatic conditions.
- Roadway characteristics which includes road geometrics, rural or urban roads and types of intersections.
- Clearances – transverse and longitudinal for ensuring safe traffic operation.
- Regulations and control measures of traffic.
- Different vehicle classes.
- Dimensions, power, speed, acceleration and braking characteristics.
- Road environment (urban, rural, signalized etc.)
