increases

decreases

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

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

1

2

0.5

10

1500 vehicles per hour

2000 vehicles per hour

2500 vehicles per hour

3000 vehicles per hour

spot speed data

origin and destination data

traffic volume data

accident data

pie chart

spot maps

condition diagram

collision diagram