Road Safety Signs Free _BEST

Roadway signs in the United States increasingly use symbols rather than words to convey their message. Symbols provide instant communication with roadway users, overcome language barriers, and are becoming standard for traffic control devices throughout the world. Familiarity with symbols on traffic signs is important for every road user in order to maintain the safety and efficiency of our transportation facilities.

The color of roadway signs is an important indicator of the information they contain. The use of red on signs is limited to stop, yield, and prohibition signs. A white background indicates a regulatory sign; yellow conveys a general warning message; green shows permitted traffic movements or directional guidance; fluorescent yellow/green indicates pedestrian crossings and school zones; orange is used for warning and guidance in roadway work zones; coral is used for incident management signs;** blue indicates road user services, tourist information, and evacuation routes; and brown is for guidance to sites of public recreation or cultural interest.

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Sign shape can also alert roadway users to the type of information displayed on a sign. Traffic regulations are conveyed in signs that are rectangular with the longer direction vertical or square. Additional regulatory signs are octagons for stop and inverted triangles for yield. Diamond-shaped signs signify warnings. Rectangular signs with the longer direction horizontal provide guidance information. Pentagons indicate school zones. A circular sign warns of a railroad crossing.

Standards for the sign design and application of the signs shown here as well as for other traffic control devices are contained in the Manual on Uniform Traffic Control Devices (MUTCD). Dimension drawings for signs can be found in the Standard Highway Signs book. Both of these books are available in electronic format online at This web site also contains information on standard lettering used on highway signs and pavement markings and on highway sign color specifications.

Traffic Signs or Road Signs are signs erected at the side of roads to provide information to road users. Pictorial signs are used as symbols in place of words. As control devices for traffic, signs need full attention, respect and adequate driver's response. There are three basic types of traffic signs:-

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The Bipartisan Infrastructure Law (BIL) established the Safe Streets and Roads for All (SS4A) discretionary program with $5 billion in appropriated funds over 5 years, 2022-2026. The SS4A program funds regional, local, and Tribal initiatives through grants to prevent roadway deaths and serious injuries. Over $3 billion is still available for future funding rounds.

The program supports the development of a comprehensive safety action plan (Action Plan) that identifies the most significant roadway safety concerns in a community and the implementation of projects and strategies to address roadway safety issues. Action Plans are the foundation of the SS4A grant program. SS4A requires an eligible Action Plan be in place before applying to implement projects and strategies. The SS4A program provides funding for two types of grants:

Implementation Grants fund projects and strategies identified in an Action Plan that address roadway safety problems. Implementation Grants may also fund supplemental planning and demonstration activities as described above on this website, as well as planning, design, and development activities for projects and strategies identified in an Action Plan.

Below are illustrative examples of projects and strategies that could be conducted as part of an Implementation Grant. This list is not intended to be exhaustive in nature and could include infrastructure, behavioral, and operational safety activities identified in an Action Plan:

Where to Use: Connecticut DOT used fluorescent yellow sheeting to improve signing at horizontal curves between 2002 and 2006. These curves were selected through a regular program called the Suggested List of Surveillance Study Sites (SLOSSS), which uses crash data, traffic volumes, and roadway characteristics to identify intersections and road segments with higher than expected crash rates.

Some of the most serious crashes on rural roads occurat horizontal curves. Horizontal alignment signs,informally called curve warning signs, can improve safetyby alerting drivers to changes in roadway geometry thatmay not be apparent or expected. These signs providevisual information for the driver about the nature of thecurve they are approaching, letting them know whetherit's a gradual curve, a sharp turn, a hairpin turn, or somecombination. Different types of curve warning signs areidentified in the MUTCD.

Where to Use: Curve warning signs should be applied to any curve or turn with a history of roadway departure crashes and curves or turns with similar geometry or traffic volumes yet to experience crashes. According to the 2009 MUTCD, warning signs are required on curves or turns where the advisory speed is 10 mph less than theposted speed.

1. University of California, Berkley, Institute of Transportation Studies, Technology Transfer Program, Tech Transfer Newsletter, "Signs for Curves and Turns." Available at: -2/signs-for-curves-and-turns.php.

The use of retroreflective strips on sign posts may be beneficial whenthere is a need to draw additional attention to the signs, especially atnight. Reflective strips may be added to Stop signs, curve or intersectionwarning signs, regulatory or guidance signs, etc.

Where to Use: The MUTCD provides the following guidance for the useof reflective strips on sign posts: "The material must be at least 2 incheswide and must be placed the full length of the post, from the sign towithin 2 feet above the horizontal surface into which the sign is fixed.In addition, the color of the material must match the background colorof the sign except that the color of the strip for Yield and Do Not Entersigns must be red."

Doubling the use of either Intersection Ahead warning signs or Curve Ahead warning signs (i.e., on the left and right) is recommended for locations where the crash rates have not been reduced after installation of a single advanced warning sign.

At locations where Intersection Ahead warning signs are used, it isrecommended that street name plaques be placed underneath theupcoming street sign. These street name plaques provide the driverwith additional information about the street so he or she can make anearly decision regarding potential turning movements.

Advanced intersection warning signs can help alert drivers to the presence of an intersection ahead. Signs can be placed with sufficient distance prior to the intersection to allow drivers to perceive and react. They can also be installed on both sides of the roadway to solicit greater awareness.

Where to Use: Advanced intersection warning signs are to be applied predominantly on single through lane, high-crash, stop-controlled State intersections in both rural and urban areas. They may also be applied on dual through lane, high-crash, stop-controlled intersections with lower traffic volumes (less than about 25,000 average annual daily traffic (AADT)) where the use of J-treatments is not appropriate and the frequency of acceptable gaps for entering traffic is such that long waiting and higher risk taking are present at the intersection.

A high number of crashes relate to the driver's inabilityor failure to see the Stop sign at stop-controlledintersections. To improve recognition of the signs,larger Stop signs can be installed. Sizes can rangefrom 30 inches, to 36 inches, to 48 inches and larger, ifneeded.

Where to Use: While roadway classification and speed can help determine proper Stop sign size, larger sizes may be used when crash types indicate that Stopsign visibility may be an issue.

Two Stop signs (mounted left and right) can be usedto call greater attention to the need for motorists tostop at an intersection. The first Stop sign is installedat the traditional right side location; a second isrecommended in the median (if available) of theapproach. To accommodate this left-mounted Stopsign, a small mountable curb is suggested. Thiscurb and associated pavement markings provide themotorist with additional information that he or she isentering an intersection.

When specialized conditions exist, supplemental warning signs may be used to notifyroad users of the possibility that slower and more susceptible road users may be ahead.Examples include Share The Road, Trail Crossing, and Equestrian Crossing signs.

Chevron signs (or curve delineation signs) indicate todrivers the alignment of the roadway when they arewithin the actual horizontal alignment of a curve. Thesigns show the shape and degree of curvature, and theyguide drivers through the entire curve or turn.

Where to Use: Chevrons should be installed at any curve or turn with a history of roadway departure crashes and at curves or turns with similar geometry or traffic volume yet to experience crashes. According to the 2009 MUTCD, alignment delineation (or a single-directional large arrow) is required on curves or turns where the advisory speed is 15 mph less thanthe posted speed limit. They can be installed at locations where no chevrons currently exist, or to supplement chevrons that are already in place.

37 As stated in NCHRP Series 500 Reports ( ). Proven: The safety effect for other similar applications has shown a proven benefit. Tried: The treatment has indications that it can be expected to reduce crashes, but has some conflicting reports as to its associated safety effects or has been deployed and observed to be effective. Experimental: New treatments that still need to be tested and for which the safety effect is unknown. Unknown: Not enough is known about an associated safety performance. [ Return to note 37. ] 2351a5e196