Nelok, Inc.

P.O. Box 7919

Woodlands, TX 77387

Tel: 1 281 367-5310

Fax: 1 281 367-2891

Paradigm Traffic Systems, Inc.

5705 Airport Fwy

P.O. Box 161607

Haltom City, TX 76117

Tel: 1 817 831-9406

Fax: 1 817 831-9407

Traffic Engineering Control

Route 1 Box 1432

Centerville, TX 75833

Tel: 1 903 536-2296

Fax: 1 903 536-2397

Never-Fail Loop Systems

7911 NE 33rd Drive, Unit 160

Portland, OR 97211 USA

Tel: 1 503 408-9248

Fax: 1 503 408-1032