BTS | Table 1 - State Survey of Speed Monitoring Programs

Bureau of Transportation Statistics (BTS)

Table 1
State Survey of Speed Monitoring Programs

		Number of responses	Percentage
Number of stations	Increase	8	16
	Decrease	11	22.5
	No change	19	39
	Discontinued	11	22.5
Vehicle classification	Yes	13	34
Vehicle classification	No	25	66
Monitoring direction	One direction	19	50
Monitoring direction	Both directions	19	50
Sessions per year	Daily	4	10
	Monthly	1	3
	Quarterly	20	53
	Semi-annually	3	8
	Annually	4	10
	As needed	6	16
Session duration	24 hours	33	87
	48 hours	2	5
	72 hours	1	3
	Continuous	2	5

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http://www.bts.gov/publications/journal_of_transportation_and_statistics/volume_03_number_03/paper_05/table_01.html