are owned and maintained by the state and the use of most of their sections is paid via electronic vignettes or toll. Bypasses of large towns and other sections that are used for local traffic tend to be exempt from the vignette requirement. Highways The highway network is divided into three classes, which are distinguished by the number of digits in the highway number. The class number can be optionally mentioned in written text alongside the road number, separated by a slash. First and second class roads in both countries use blue rectangular shields. Slovak third class roads use a white oval highway shield. First class roads (, ) are designated by an up to two-digit number and are owned by the state. Road numbers 61 and above run exclusively on Slovak territory under the original Czechoslovak numbering. Second class roads (, ) are designated by a three-digit number and are owned by the regions. The first digit identifies the general location of the route: 1xx - south Bohemia 2xx - north Bohemia 3xx - east Bohemia, Vysočina 4xx - Moravia and Silesia 5xx - Slovakia 6xx - former first class roads replaced by a motorway (Czech Republic only) Third class roads (, ) are also owned by the regions. In the Czech Republic, these are designated by four to five-digit numbers, where the first three digits are the number of a nearby higher class road, padded by zeroes if less than three digits. Slovakia renumbered these roads in 2015, and now uses a four digit numbering where the first three digits identify the district that the road runs in. The road numbers are not marked on most maps and road signs in the Czech Republic, however, Slovakia started doing so after the reform. The general speed limit on highways is 90 kilometers per hour, reduced to 50 km/h in urban areas. A section of a highway can also be signed as a road for motor vehicles (, ), which are off-limits for other kinds of traffic. The speed limit on such roads in the Czech Republic is 90 km/h for single carriageways and 110 km/h for double carriageways, reduced to 80 km/h in urban areas. Other roads Local roads (, ) are owned and managed by municipalities (all towns and cities have also status of municipalities). According to the Road Act and its implementing regulations, they should be numbered