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

Table 7

Variable importance after filtering feature variables.

Variable	Variable importance
mean travel time of floating car	113.69
traffic state parameter	45.07
density of vehicle	41.38
median travel time of floating car	13.46
speed of vehicle	4.88
density of floating car	1.17
speed of floating car	0.94