Developing a Travel Time Estimation Method of Freeway Based on Floating Car Using Random Forests

Table 10

The variables entering the model after eliminating multicollinearity.

traffic state	variables
free-flow	mean travel time of floating car , traffic state parameter , occupancy of vehicle , number of floating car
transition	median travel time of floating car , traffic state parameter , occupancy of vehicle , number of floating car
congestion	mean travel time of floating car , traffic state parameter , occupancy of vehicle , number of floating car