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Buying Guides13 Types of Traffic Control Devices and Equipment Checklist
Traffic control devices regulate traffic, warn people about hazards, and guide them along a route. They include stop signs, traffic signals, pavement markings, cones, drums, barricades, and electronic message boards. The right...
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Sign BasicsHow Many Road Signs Are In The US?
There is no national count of road signs in the United States. What exists is better than a guess: the Federal Highway Administration (FHWA) built a sign-by-sign cost model in 2007, several...
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MUTCD & ComplianceIs It Legal to Put Up Your Own Road Sign?
Yes. In many situations you can put up your own sign on property you own or manage. Parking signs, delivery directions, and private driveway signs are everyday examples. The line that matters...
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Data & ResearchHow Many Waymo Cars Are There?
Waymo does not maintain a live public counter for its robotaxi fleet. Its federal software recall filings, however, provide an unusually detailed record. Each filing states how many vehicles carried the affected...
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Data & ResearchHow Many Flock Cameras Are In the US?
As of August 26, 2026, independent mapping has verified 111,105 Flock Safety cameras in the United States. Flock's own most recent figure, more than 120,000 cameras across 49 states, dates to July...
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Data & ResearchRoundabouts by State: Which States Have the Most Roundabouts?
Roundabouts are no longer rare in the United States. A July 2026 extraction of Kittelson’s live U.S. roundabout data lists 15,269 roundabouts and traffic circles across the country. The updated data also...
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Sign BasicsHow to Install a Road Sign
Installing a road sign correctly comes down to placement, height, post stability, and visibility. The sign should be easy to see, mounted at the right height, and attached without bending the panel...
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GuideHighway Emergency Numbers by State
When something goes wrong on the road, the safest number to remember is 911. Use 911 for a crash, injury, fire, blocked lane, dangerous debris, impaired driver, stranded vehicle in an unsafe...
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Sign BasicsWhat is a Yield Sign?
A yield sign means slow down, look for traffic, and be ready to stop. You do not always have to stop at a yield sign, but you do have to let the...
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GuideMost Common Street Names in the U.S.
Every town seems to have a Main Street, and the data backs that up. Main St is the most common street name in the United States, appearing in 9,361 cities in the...
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MUTCD & ComplianceMUTCD by State: Which Traffic Control Manual Applies Where
If you are bidding, ordering, or installing traffic signs in a new state, the National MUTCD may not be the only document you need to check. Some states adopt the National MUTCD...
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GuideSpeed Limits by State 2026: US Map and Table
Speed limits vary by state, roadway type, and local posting. This guide compares the highest posted speed limits across the United States, then breaks the data down by rural interstates, urban interstates,...
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