UNITED RENTALS, INC. THOSE CORPORATIONS WHICH ARE INDENTED REPRESENT SUBSIDIARIES OF THE CORPORATION UNDER WHICH THEY ARE INDENTED. State of Name of Subsidiary Incorporation ------------------ ------------- United Rentals Trust I............................................ Delaware United Rentals (North America), Inc............................... Delaware Advance Barricades and Signing, Inc............................. Florida Coast Line Marking, Inc......................................... Florida Flasher Co. of Kansas, Inc...................................... Kansas Flasher Company of Oklahoma, Inc................................ Oklahoma Jadco Signing, Inc.............................................. Florida Lectric Lights Company.......................................... Texas Liddell Bros., Inc.............................................. Massachusetts Liddell Management Co., Inc..................................... Massachusetts Precision Pavement Marking, Inc................................. Minnesota State Barricading, Inc.......................................... Ohio State Sign, Inc................................................. Ohio Traffic Safety Services, Inc.................................... North Dakota Two Way Traffic, Inc............................................ Pennsylvania United Rentals Gulf, Inc........................................ Delaware United Equipment Rentals Gulf, L.P............................ Texas United Rentals Northwest, Inc................................... Oregon Provisto, S. de R.L. de C.V................................... Mexico U.S. Rentals, S. de R.L. de C.V............................... Mexico United Rentals Southeast, Inc................................... Delaware United Rentals Southeast, L.P................................. Georgia United Rentals of Canada, Inc................................... Ontario Warning Lites of Minnesota, Inc................................. Minnesota Warning Safety Lights, Inc...................................... Florida Warning Safety Lights of Georgia, Inc........................... Florida WLI Industries, Inc............................................. Illinois Warning Lites of Indiana, Inc................................. Indiana Warning Lites of Iowa, Inc.................................... Iowa Safe-T-Flare Services, Inc.................................... Missouri Work Zone Safety, Inc........................................... Colorado Woudenberg Enterprises, Inc..................................... Arizona Wynne Systems, Inc.............................................. California