Shields for CR 581 in Tampa, Florida. Some mostly older shields in Florida add a "C-" before the number, as the original county roads in Florida were turned over from the state, and instead of replacing the shields the "C-" was added in the state road shield. Later the county replaced the shields but kept the "C-".

A county highway (also county road, county route, usually abbreviated CH or CR) is a road in the United States that is usually maintained by the county highway department. Numbering may be coordinated by the state. Shields are usually a yellow-on-blue pentagon or a black-on-white rectangle, or black text on a white rectangle (largely older signs). The majority of states have county highways, as they have unincorporated areas. Several states, including Virginia and North Carolina have no county highways in most counties, as the state maintains all roads in unincorporated areas. Tampas skyline For alternate meanings, see Tampa (disambiguation) Tampa is a city located in Hillsborough County on the west coast of Florida. ... State nickname: Everglade State, Sunshine State Other U.S. States Capital Tallahassee Largest city Jacksonville Governor Jeb Bush Official languages English Area 170,451 km² (22nd)  - Land 137,374 km²  - Water 30,486 km² (17. ... Originally, a county was the land under the jurisdiction of a count (in Great Britain, an earl, though the original earldoms covered larger areas) by reason of that office. ... In law, a region of land is unincorporated if it is not a part of any municipality. ... State nickname: Old Dominion Other U.S. States Capital Richmond Largest city Virginia Beach Governor Mark R. Warner Official languages English Area 110,862 km² (35th)  - Land 102,642 km²  - Water 8,220 km² (7. ... State nickname: Tar Heel State Other U.S. States Capital Raleigh Largest city Charlotte Governor Michael Easley Official languages English Area 139,509 km² (28th)  - Land 126,256 km²  - Water 13,227 km² (9. ...

In addition, any county-maintained road, whether or not it is given a signed number, can be called a county road. Depending on the state and county, this can be named in the traditional way, and/or assigned a grid reference, such as 2000 E (a north-south road running 20 blocks east of the zero point). Many other systems are also used; some counties rather arbitrarily assign numbers to all maintained roads, but don't mark them (or only mark them on standard street sign blades). The term grid has several meanings in various fields: in mathematics and geometry, a grid is a system of two sets of lines that intersect each other at a fixed angle, usually a right angle (i. ...

Many county roads, especially in rural areas, are not major thoroughfares and receive little or no maintenance. Therefore, they may be in poor condition or even unpaved. It can be common to find minor county roads in backwoods areas that are just sand or gravel, seeing only foot and four-wheel drive traffic periodically. Four wheel drive or 4x4, is a type of four wheeled vehicle drivetrain configuration that enables all four wheels to receive power from the engine simultaneously in order to provide maximum traction. ...