United Rentals Opens Trench Safety Branch in San Luis Obispo, California

Greenwich, CT - May 23, 2005


United Rentals, Inc. (NYSE: URI), the world's largest equipment rental company, today announced the opening of its newest trench safety rental branch in San Luis Obispo, Calif. This branch, located in San Luis Obispo at 635 Tank Farm Road, will provide customers with underground construction equipment rentals, sales and service and a comprehensive line of contractor supplies.

"We are pleased to participate in the thriving economy of California's central coastline with the opening of this trench equipment rental location," said Steve Smith, branch manager of United Rentals. "Residential and non-building construction is growing rapidly between Ventura and Salinas. By expanding our service to customers in this area, we will be filling a need for quality equipment, service and supplies."

The new location will rent the latest technologies in steel trench shields, aluminum trench shores, steel crossing plates and custom slide rail systems, as well as a range of confined space ventilators, detectors and other equipment. United Rentals also offers delivery service, 24-hour emergency response service and professional safety training for customers.

About United Rentals

United Rentals, Inc. is the largest equipment rental company in the world, with an integrated network of 730 rental locations in 48 states, 10 Canadian provinces and Mexico. The company's 12,900 employees serve construction and industrial customers, utilities, municipalities, homeowners and others. The company offers for rent over 600 different types of equipment with a total original cost of $3.7 billion. United Rentals is a member of the Standard & Poor's MidCap 400 Index and the Russell 2000 Index® and is headquartered in Greenwich, Connecticut. Additional information about United Rentals is available at www.unitedrentals.com.


Chuck Wessendorf
VP, Investor Relations and Corporate Communications
United Rentals, Inc.
(203) 618-7318 

Nicole Salas
Manager, Corporate Communications
United Rentals, Inc.
(203) 618-7246