it is named AP-9 (see below). two numbers, elsewhere. Beltways are named with a one or two letter code identifying the city they orbit, plus two digits indicative of the general distance. For example, the M-50 is further from the city of Madrid than the M-40. City access motorways are named similarly to beltways, like TO-21 for a freeway leaving the A-40 towards Toledo. Tolled motorways add a "P" (thus, "AP-") before the dash, and must be clearly identified as such in road signs. For example, AP-9. An exception to this naming rule are the radial toll motorways starting in Madrid, R-2 through R-5 All such names are posted in white letters on blue background, like: A-49 or AP-4 . Note that none of these naming and coloring requisites affect roads under the authority of the Autonomous Communities. For example, the A-8 road in the Basque Country is a tolled autopista, as are the C-16, C-32 and C-33 in Catalonia. Other communities such as Madrid do follow the convention, and have names as MP-203 for a tolled road and M-501 for a free autovía. Furthermore, roads under the authority of the Andalusian government also start with A, but they have longer numeric codes and different coloring. Interurban motorways The roads listed below form the backbone of the Spanish high capacity network, connecting all provincial capitals and other major towns and destinations. Until recently, the network suffered from a high radiality, which collapsed the several Madrid beltways and the roads into the city and region. Since the 2000s, an effort to improve the situation was made based on two actions: Build a new set of radial autopistas (named R-n instead of A-n) complementary to the old radial autovías near Madrid. Such tolled autopistas would form a new system of accesses to the capital that merges with their autovía counterparts far from Madrid. The main advantage to these roads is that they allow true fast travel from the first kilometre, while the radial autovías near Madrid (among the oldest autovía stretches in Spain) frequently go through populations, have constant entries and exits and suffer several other conditions which both jam them and make their first kilometres limited to speeds well under the normal limit. Invest heavily in de-radialization efforts that create true cross-country high-capacity axes without passing through Madrid. For example, the A-66 (Autovía Ruta de la Plata) which connects the southern