Arterial Management*

	Data Year	% of Deployment
Signalized intersections covered by electronic surveillance	1997	N/A†
	1999	9%
	2000	20%
	2002	27%
	2004	34%
	2005	36%
	2006	39%
	2007	34%

	Data Year	% of Deployment
Signalized intersections under centralized or closed loop control	1997	47%
	1999	47%
	2000	49%
	2002	48%
	2004	50%
	2005	53%
	2006	54%
	2007	52%

	Data Year	% of Deployment
Arterial miles covered by Variable Message Signs	1997	N/A†
	1999	2%
	2000	2%
	2002	2%
	2004	4%
	2005	2%
	2006	3%
	2007	3%

	Data Year	% of Deployment
Arterial miles covered by Highway Advisory Radio	1997	N/A†
	1999	1%
	2000	1%
	2002	2%
	2004	2%
	2005	2%
	2006	2%
	2007	3%

* Trend data is based on 78 large metropolitan areas surveyed in 1997, 1999, 2000, 2002, 2004, 2005, 2006 and 2007.

^†N/A = No data available for this survey year