A complete guide to street signs, their categories, and how they keep roads safe
Street signs are standardized traffic control devices installed along public roads to regulate movement, warn of hazards, and guide drivers and pedestrians. Governed by the Manual on Uniform Traffic Control Devices (MUTCD) and DOT standards, every sign on a public road follows strict specifications for shape, color, size, and reflectivity. Whether you need to replace a damaged sign, outfit a private road, or order compliant signage for a municipality, understanding the types of street signs available is the first step.
Common Questions About Buying Street Signs
- What materials are street signs made from?
- Most regulatory, warning, and guide street signs are manufactured on .080 aluminum with reflective sheeting applied to the face. Trafficsigns.com offers three reflectivity grades: Engineer Grade (standard reflective), High Intensity (very reflective, suitable for higher-speed roads), and Diamond Grade (ultra-reflective, meeting the highest DOT and MUTCD visibility requirements). All grades feature radius corners and 3/8" pre-punched mounting holes.
- What sizes are street signs available in?
- Sizes vary by sign type and application. Common rectangular parking and regulatory signs are available in 12x18", 18x24", and larger formats. Diamond-shaped warning signs typically come in 24", 30", 36", and 48" sizes. Street name advance signs such as the W16-8 are commonly offered in 36x12". Always verify the required size against MUTCD guidelines for your specific road type and speed limit.
- Are street signs I purchase DOT and MUTCD compliant?
- Yes. All High Intensity and Diamond Grade signs sold at Trafficsigns.com meet DOT and MUTCD state and federal guidelines. Engineer Grade signs meet standard reflectivity requirements for most low-speed and private road applications. If your project requires certified compliance for a public road or municipality, select High Intensity or Diamond Grade reflective material at checkout.
- Can I get a custom street sign made?
- Yes. Trafficsigns.com offers printable, customizable street signs including advance street name signs, parking time-restriction plaques, and school zone supplemental signs. You can specify text, arrow direction, days of the week, and hours of operation depending on the sign type. Custom options are printed on the same DOT-compliant reflective aluminum used for standard signs.
- Do you offer bulk pricing on street signs?
- Yes. Volume discounts are available on most sign types. For example, the When Children Are Present sign (S4-2) in Engineer Grade starts at $22.10 each and drops to $18.56 each when ordering 50 or more units. Pricing tiers typically begin at quantities of 4, 7, 16, and 50 units. Check the product page for specific tier pricing on each sign.
- How long do aluminum street signs last outdoors?
- Reflective aluminum street signs are built for long-term outdoor installation. With proper mounting and no physical damage, Engineer Grade signs typically perform well for several years. High Intensity and Diamond Grade sheeting is rated for extended service life in all weather conditions, including direct sun, rain, snow, and temperature extremes. The rigid .080 aluminum substrate resists bending and corrosion.
- How do I mount a street sign after purchasing?
- All signs sold on Trafficsigns.com include 3/8" pre-punched mounting holes at standard locations, making them compatible with U-channel posts, telespar posts, and square tube post systems. Use appropriate hardware for your post type. For high-wind areas, consider back-to-back sign mounting or wind-rated post anchors. Installation instructions vary by local jurisdiction, so confirm post height and setback requirements with your local traffic authority.
What Is a Street Sign?
The primary purpose of street signs is safety. Consistent design across all jurisdictions means drivers recognize a sign's meaning instantly, regardless of where they are. A diamond-shaped yellow sign always signals a warning. A red octagon always means stop. This uniformity is not optional for public roads; it is a legal requirement under federal and state traffic codes.
Public road street signs are installed and maintained by government agencies, but property managers, municipalities, and private developers also purchase compliant signs for parking lots, private communities, campuses, and industrial facilities.
Types of Street Signs Used on Public Roads
Regulatory signs communicate traffic laws and rules that drivers must follow. They are typically rectangular with white backgrounds and black, red, or green text. Examples include speed limit signs, stop signs, yield signs, no parking signs, and turn prohibition signs. The No Parking This Side of Street sign (AR-211) and the Number of Tracks sign (R15-2p) are both regulatory signs used on public roads.
Warning signs alert drivers to upcoming hazards or changes in road conditions. They use a yellow background with black text or symbols, most commonly in a diamond shape. Street sign examples in this category include the Watch for Ice on Bridge sign (W19-2), the When Children Are Present school zone sign (S4-2), and advance street name signs like the W16-8 and W16-8A, which prepare drivers for upcoming intersections.
Guide signs provide directional and informational guidance. They typically use green backgrounds with white text for highway and road information, blue for services, and brown for recreational areas. Street name signs, mileage markers, and exit signs fall into this category.
Many public road street signs include supplemental plaques that add detail to the primary sign. Time-of-day plaques, day-of-week signs like the S4-6, and custom restriction plaques like the R8-3hP Custom Times of Day sign attach below regulatory signs to clarify when a restriction applies.
School zone signs are a specialized subset of warning and regulatory signs. They use fluorescent yellow-green backgrounds for maximum visibility and are used in conjunction with speed limit signs and pedestrian crossing signs. The When Children Are Present sign (S4-2) and the Day of Week sign (S4-6) are commonly paired in school zone assemblies.
Can You Legally Buy Street Signs?
For public roads, sign installation is typically performed by or under the authority of a local government agency. A private citizen cannot install a sign on a public right-of-way without authorization, regardless of where the sign was purchased. However, for private roads, parking lots, gated communities, and commercial properties, purchasing and installing MUTCD-compliant signs is standard practice.
Buying a sign that matches public road specifications is not only legal but recommended. Using compliant reflective aluminum signs on private property ensures your signage is legible, durable, and defensible from a liability standpoint. Trafficsigns.com sells the same DOT-compliant sign blanks used by municipalities, available to any buyer.
What Street Signs Appear on Driver's License Tests?
Signs frequently covered on driver's tests include stop signs, yield signs, speed limit signs, no passing zone signs, railroad crossing signs, school crossing signs, and various warning signs for curves, intersections, and changing road conditions. State manuals may also include less common signs such as the Watch for Ice on Bridge sign (W19-2) and school-zone-related signs such as the When Children Are Present sign (S4-2).
Familiarizing yourself with sign shapes and color conventions is one of the most effective ways to prepare for a signs-based driving test. Regulatory signs are generally rectangular, although some use special shapes such as the octagonal stop sign and triangular yield sign. Warning signs are typically diamond-shaped, with school-area pentagons and railroad warning circles being the exception. Guide signs are usually rectangular and commonly use green, blue, brown, or white backgrounds depending on their purpose.
Street Sign Reflective Material Comparison
Choosing the right reflective grade affects visibility, compliance, and long-term performance. Here is how the three grades available at Trafficsigns.com compare for public road street sign applications.
| Feature | Engineer Grade | High Intensity | Diamond Grade |
|---|---|---|---|
| Reflectivity Level | Standard | Very Reflective | Ultra Reflective |
| DOT / MUTCD Compliance | Standard applications | Meets DOT & MUTCD | Meets DOT & MUTCD |
| Typical Use | Low-speed private roads, parking lots | Local and collector public roads | High-speed roads, highways, critical zones |
| School Zone Suitability | Limited | Suitable | Recommended |
| Visibility in Low Light | Adequate | High | Maximum |
| Substrate | .080 Aluminum | .080 Aluminum | .080 Aluminum |
| Mounting Holes | 3/8" Pre-punched | 3/8" Pre-punched | 3/8" Pre-punched |
| Volume Pricing Available | Select products | Yes | Yes |
Street Signs Available at Trafficsigns.com
Browse a selection of DOT-compliant public road street signs in stock and ready to order. All signs are manufactured on reflective aluminum and ship with pre-punched mounting holes.
Parking Signs / No Parking Signs
No Parking This Side of Street Sign - AR-211
From $21.95
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Warning Signs / School Zone Signs
When Children Are Present Sign - S4-2
From $22.10
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Warning Signs / Road Condition Signs
Advance Street Name Sign - W16-8
From $33.25
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Warning Signs / Road Condition Signs
Watch for Ice on Bridge Sign - W19-2
From $44.25
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Parking Signs / No Parking Signs
Custom Times of Day Plaque Sign - R8-3hP
From $21.95
Shop on Trafficsigns.comOrder DOT-Compliant Street Signs for Your Road or Property
Trafficsigns.com carries a full range of public road street signs built to MUTCD and DOT specifications. From no parking signs and school zone plaques to advance street name signs and road condition warnings, every sign ships on pre-punched reflective aluminum ready for post mounting. Volume discounts are available on most products.
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