AT&T Business Solutions is working with WebTech Wireless Inc. to provided a wireless vehicle tracking and monitoring solution to the Port of Los Angeles and the Port of Long Beach in California. 
The technology and services from AT&T Business Solutions and WebTech combines GPS and General Packet Radio Service (GPRS) to track newly replaced port drayage trucks equipped with low-emission engines.
http://www.webtechwireless.com
http://www.att.com