Peek Traffic and U.S. Traffic were purchased by the Houston, Texas based firm Signal Group, Inc. in July of 2008, from the previous owners, Quixote Corporation. Signal Group owns several companies involved in the traffic control, signalling and traffic safety industries.

Currently, the Signal Group includes:

• Peek Traffic
• U.S. Traffic
• Rayolite Corporation - Manufacturers of raised pavement markers.
• Hallen Products, Ltd, - Makers of the IronStar line of snowplow safe roadway markers.

Signal Group is also associated with several Mexican firms owned by the Grupo Signal Corporation.