A Cost Effective Route Guidance Method for Urban Areas Using Histograms

Table 1

Example of a Group Probability Distribution for vehicles during an observation period .

Class number	Class range	Class midpoint	Frequency of occurrence
0		5	8	0.2
1		15	16	0.4
2		25	6	0.15
3		35	6	0.15
4		45	4	0.1
5		55	0	0