Interwest Safety Supply, LLC

A yellow Trail X-ING sign next to dirt road

Washington State Road Signs

If you’re looking for road signs for the state of Washington or you simply need signs shipped to Washington state, you’ve come to the right place. We offer high-quality MUTCD signs, accessories, and traffic control products.
Scroll to see all the sign options or use these quick links to jump to the signs you need:

  • Construction Signs
  • Regulatory Signs
  • Parking Signs
  • Warning Signs
  • Guide Signs
  • Work Zone Safety Signs
  • More Signs & Products

Interwest Safety Supply is an unchallenged leader of the traffic safety and sign industry. Since 1977, Interwest has been serving the Western United States with high-quality, engineer grade, MUTCD specified safety signs, accessories, and traffic control products.

Staffed with experienced professionals in both the public and private sectors, Interwest is fully capable of serving your government body, private enterprise, or highway construction company.

Construction Signs

Construction signs are vital for many different industries in Washington state and are amongst our most popular product categories.

Construction signs are built with solid aluminum, then laminated in high-quality reflective sheeting. Highway construction companies, as well as private enterprises like public contractors, are sure to appreciate the quality of these signs.

Regulatory Signs

Perfect for city or state governments, regulatory signs offer helpful solutions for new roads, traffic lights, or other changes in public transportation.

A wide selection of stop signs, yield signs, and street signs are all included under this category.

Warning Signs

Warning signs provide a necessary service for Washington state roadways, state and local government offices, and other private enterprises in warning and protecting the public.

Guide Signs

Guide signs are a particularly important part of the Washington state roadway construction process, as well as governmental signage for national parks, interstates, and exits.

The wide variety of guide signs from Interwest Safety Supply are available in Fluorescent Diamond Grade (DG) reflective sheeting and constructed using high-quality aluminum.

Work Zone Safety Signs

To comply with various local, state, and federal regulations in Washington, construction sites must maintain appropriate work zone safety signs for workers or visitors who enter the premises.

Work zone safety signs assist contractors or construction companies to secure their construction sites with caution notices, danger observances, and no trespassing signs.

Parking Signs

Parking signs are necessary components of virtually every industry, from hotels and places of worship to universities and sports arenas.

Interwest Safety Supply offers signs that help private enterprises throughout Washington indicate parking locations, restricted areas, and handicap or carpool-only spaces.

Additional Signs

  • School Traffic Signs
  • Solar Powered Signs
  • Property Signs
  • Residential Signs
  • Construction Roll-Up Signs
  • Hotel and Valet Signs
  • Traffic Cone Signs
  • Oversize Load Signs

Additional Products

  • Traffic Delineators
  • Traffic Barriers
  • Smart Traffic Solutions
  • Object Markers
  • Line Markings
  • Safety Equipment
  • Traffic Control Products
  • Discount Safety Gear
  • Portable Sign Stands
  • Sign Mounting Hardware
  • Metal Sign Posts
  • Band-It Tools

Serving the State of Washington

One of Interwest Safety Supply’s five regional warehouses is located conveniently in Provo, Utah enabling us to provide efficient service to Washington state.

Additionally, a staff of experienced professionals is always prepared to address any questions or concerns and create outstanding experiences for every one of our commercial and private clients.

744 East Lakeview Parkway

Provo, Utah 84606

Office: 801-375-6321 Internet Sales: 866-791-3391 Fax: 801-377-2739

Hours: Monday-Friday 7:30 a.m. – 4:30 p.m.

A Few of the Cities We Serve in Washington State









Spokane Valley

Federal Way












South Hill




We serve the entire state of Washington. If you don’t see your city listed above, we can still ship to your location.

Why Professionals Choose Interwest Safety Supply LLC

Interwest Safety Supply has built a legacy of quality during our 40 years of industry experience. As the largest distributor of safety supplies in North America, Interwest is dedicated to providing our customers with valuable products, helpful customer service, and affordable safety solutions.

This is why we firmly believe that our customers, and the services they receive, truly speak for themselves.

“I would highly recommend them to everyone. The staff is wonderful. Always so helpful. Their products are top of the line. I have been doing business with them for over 20 years. I go to them for all of our traffic control devices.”


– Ava B

“We have been working with Interwest for years and they are the best at their line of work! We have had custom signs, safety equipment, Ada items, paint, and much more supplied by them and have been very pleased with each experience from start to finish! Customer service and quality are five stars all the way! Would highly recommend them to anyone!”


– Jake M.

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