Interwest Safety Supply, LLC

Highway Construction Companies

Over the past 40 years, Interwest has provided heavy civil contractors with the very best in high-quality traffic safety equipment and signs. Our five regional warehouses allow us to serve our customers with superior customer service and optimal lead times.

What makes us different is the expertise that we bring to contractors that do business with us. In addition to selling traffic safety products, we can also help with quotes, project estimates, submittals and meeting specifications. This allows contractors to bid on jobs accurately, intelligently, and ultimately save more money.

Talk to a product expert now: (801) 375-6321

How We Help Contractors

At Interwest, we’re the foremost experts in roadway safety. We routinely help our heavy civil contractors by providing them with the following value-add services:

Quotes and estimates for upcoming project bids—We do the takeoff for the projects that we work on. Provide us with a set of plans and specifications, and we’ll break everything down and come up with a quote to meet your requirements.

Bulk orders to start a project—The prices of raw materials can fluctuate, as we’ve seen over the past two years with a steady increase in the cost of steel. Buying in bulk before starting a project will allow you to avoid potential price increases and save money.

Mid-project orders—Projects are inherently unpredictable. There’s always an evolution as jobs progress, and we’re here to help you finish your project on time and within budget. If you need to place a mid-project order or procure product replacements, we’ll work closely with you to meet your budget and lead time requirements.

Post-project orders to replenish inventory—Once the job is completed and the proverbial keys handed over, many heavy civil contractors are left with bare shelves in their warehouse. Interwest can help you determine the best way to go about replenishing your inventory so that you can hit the ground running on the next project without having to deal with lead times.

Our Products

The products we manufacture and carry meet the stringent specifications of state, federal, and local agencies. At Interwest, we provide everything heavy civil contractors need for the roadway—except the road. 

Here are just a few of the many road safety signs and products that we offer:

Signs & Accessories

Regulatory Signs—We can help you choose the sign with the right specifications for the area or state you’re in.

Construction Signs—Keep your workers and job site safe with our wide range of construction signs.

Construction Roll-up Signs—Inform motorists about upcoming construction areas with our construction roll-up signs.

Traffic Control Products

Drums—Our channelizing drums and bases are molded from impact-resistant polyethylene to minimize roll after vehicle impact.

Cones—We carry a wide range of cones–from 12” safety cones to 48” channelizers.

Sandbags—18″x 27″ Orange high UV bags made out of a heavy-duty woven polypropylene and tie cord.

Intelligent Traffic

Traffic Analyzer & Accessories—Our state-of-the-art NC350 BlueStar Portable Traffic Analyzer uses Bluetooth to make data transfer a cinch. 

Distance Measuring Instrument (DMI)—The NiteStar DMI will allow you to accurately measure and record the land distance from inside a moving vehicle.

Crash Cushions & Barriers

Work Zone Crash Cushions—We offer several work zone crash cushions, including our very popular truck-mounted-attenuators.

Permanent Impact Attenuators—Choose from one of three state-of-the-art Crash Cushion Systems that offer superior performance and reliability.

Safety Supplies

Personal Safety—First aid kits, safety goggles, earplugs, hardhats, and gloves. 

Clothing—Choose from one of several high-visibility safety jackets, t-shirts, vests, and pants.

Pavement Markings

Pavement Markers—Chip seal and raised pavement markers are built tough, are easy to install, and will help improve road safety.

Glass Beads—Choose from economy or FAA-approved premium reflective glass beads.

Striping Paint – Waterborne fast-dry paint is environmentally friendly, durable and formulated for use in a wide range of applications.

About Interwest

Interwest has decades of experience providing contractors with high-quality highway construction, traffic safety, and roadway signs. We work closely with our customers to provide them with top-notch service and expert advice. 

Give us a call or contact us today to learn how we can help.


We’re headquartered in Provo, Utah, and have five strategically-located distribution facilities throughout the U.S. Orders and quotes from customers in close physical proximity to a different regional warehouse may be rerouted to reduce shipping costs and lead times.

Phone Number
Corporate Office
744 East Lakeview Parkway
Provo, Utah 84606
(801) 375-6321
5302 W. Buckeye Road, Suite 400 Phoenix, AZ
P.O. Box 25188 Phoenix, Arizona 85007
(602) 253-0683
195 S Navajo St
Denver, Colorado 80223
(303) 733-8447
Las Vegas
4475 Delancey Dr
Las Vegas, Nevada 89103
(702) 641-0447
New Mexico
5821 Coronado Avenue NE
Albuquerque, New Mexico 87109
(505) 797-2300

Why Heavy Civil Contractors Choose Interwest

Heavy civil contractors depend on Interwest to provide them with the right products with the right specifications delivered on time. Contact us today to learn more about our products and services that will add value to your next job.

Talk to a product expert now: (801) 375-6321

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