HOUSTON, TEXAS – The City of Houston has welcomed its 500th hybrid vehicle, and more are on the way. The city’s fleet includes 334 Toyota Prius models, 164 Ford Escapes, and two Honda Insights, according to www.click2houston.com.

The city hopes to expand the fleet of hybrid vehicles to 1,500 by 2010. Officials estimate that the 500 hybrids will save 226,000 gallons of gasoline annually at a cost of about $818,000.