Interwest Safety Supply, LLC


R4-18 Do Not Pass Sign – Enhanced Visibility with High-Intensity Reflective | Interwest Safety Supply

R4-18 Do Not Pass on Shoulder



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Elevate roadway safety with Interwest’s R4-18 Do Not Pass on Shoulder sign, meticulously crafted for DOT professionals. Choose from a range of sizes—24″x 30″, 36″x 48″, and 48″x 60″—and reflective sheeting options, including Diamond Grade, Engineer Grade, and High Intensity, to ensure maximum visibility and compliance with MUTCD specifications. Constructed from durable .080″, 5052-H38 aluminum with radius corners and pre-punched mounting holes, this sign is built to withstand the elements and maintain its integrity for years. Enhance your traffic control measures with a sign that’s synonymous with quality and reliability. Order now to take a step towards impeccable road safety standards with Interwest Safety Supply—where safety and integrity drive innovation.

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