Traffic volume should always be more than traffic capacity.

Traffic capacity should always be more than traffic volume.

Spot speed is the average speed of a vehicle at a specified section.

85th percentile speed is more than 98th percentile speed.

width of traffic lanes

extra width of pavement and minimum turning radius

width of shoulders and parking facilities

clearance to be provided under structures such as overbridges, under-bridges etc.

1.85m

2.44 m

3.81 m

4.72 m

traffic volume studies

speed studies

accident studies

origin and destination studies

road side interview method

license plate method

return postcard method

home interview method