Research Article

Recognition Method of Vehicle Cluster Situation Based on Set Pair Logic considering Driver’s Cognition

Table 2

Service level of urban expressway basic section.

Service levelDensity (pcu/km/lane)Speed (km/h)Maximum service traffic volume (pcu/h/lane)

Smooth (small) (large)1600
Slow (medium) (medium)2100
Congestion (large) (small)2100