Analysis of the Impact of Traffic Violation Monitoring on the Vehicle Speeds of Urban Main Road: Taking China as an Example

Table 1

Speed statistics.

Position	Before the traffic violation monitoring area	Within the traffic violation monitoring area	After the traffic violation monitoring area
Average (km/h)	48.0	37.8	50.3
Variance	100.0	49.0	94.1
Standard deviation	10.0	7.0	9.7
Range	46.0	46.0	45.0
Coefficient of variation	20.9	18.2	19.3
Skewness	0.6	1.4	0.4
Kurtosis	2.8	3.9	2.3
Maximum (km/h)	71.0	70.0	71.0
Minimum (km/h)	26.0	24.0	27.0