For the seventh year, Inc. and the Initiative for a Competive Inner City (ICIC) have teamed up to recognize America's fastest growing urban businesses through the annual Inner City 100 list. counts down to the announcement of this year's honorees on April 21 with a profile a day of one of this year's winning companies.

Today's Inner City 100 Company...

2003 Revenue: $7.8 million
Employees: 40
Mario Reyna knows how to stop traffic. Reyna, a 43-year-old electrical engineer, estimates that he has installed 10% of all the traffic signals in Houston. Traf-Tex also sells and services surveillance cameras for highways and electronic road signs. Last year Reyna moved his company to a new 8,000-square-foot building near William P. Hobby Airport.