system A stands for "autoroute" (motorway), N for "national road", D for "départementale" road and C for "communale". France still uses Route Nationale numbers from an 1824 revision of 1811 numbers made under Napoleon. Irish M, N, R, L system M stands for Motorway, N for National primary road or National secondary road, R for Regional road and L for Local road. Jamaica A, B system Japanese C, E system C stands for circular, E stands for expressway. These designations are used on most expressways in Japan outside of the urban systems. The designations, depicted with a green rectangle with white numbers and letters, are used on guide signs as well as highway shields. Netherlands' A, N system A stands for "Autosnelweg" (motorway), N for Non motorways. The A-codes use white letters on a red shield, the N-codes black letters on a yellow shield. Where a highway changes into a motorway or vice versa, it may continue to use the same number, but the letter and the color are switched. When the letter is followed by three digits, the road is typically a provincial road. When there are only one or two digits, it is typically a national road. Philippines E, N system The Philippines' new route numbering system, started in 2014, for its network of expressways (limited access roads) and national roads (of the primary and secondary types), uses E and N, respectively. National roads ("N" roads, of the primary and secondary designation) use white shields based on the Australian National Route shields, but signed with the number only, with N included for inventory purposes. Expressways ("E" roads) uses signs the same design as with national primary and secondary roads, but colored yellow, and unlike national roads, includes E to prevent confusion. Polish A, S, DK, DW system A stands for "autostrada" (motorway) S stands for "droga ekspresowa" (expressway) DK stands for "droga krajowa" (national road) DW stands for "droga wojewódzka" (voivodeship/provincial road) Senegal N, R system N stands for "national" roads while R is for "regional" roads. Slovak D, R system D stands for "diaľnica" (motorways) while R is for "rýchlostná cesta" (expressways). South African N, R, M system N stands for national road, R stands for regional road and M stands for metropolitan road. Spain A, AP, N system A, followed by one or two digits, stands for "autovía" (dual carriageway). If followed by three or four