average speed

spot speed

space-mean speed

time-mean speed

15th percentile

50 ″″percentile

85th percentile

98 ″″percentile

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