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

spot maps

pie charts

condition diagram

collision diagram

increases

decreases

first decreases and then increases after reaching a minimum value at optimum speed

first increases and then decreases after reaching a maximum value at optimum speed