traffic just in 2008, and there are at least three more highways in study. Due to the limited financial capabilities of the Aragon regional government, many of them might be built as toll roads. *: in construction — †: planned Asturias The highway network in the mountainous Principality of Asturias is severely limited by the complexity of its relief, with a dense network of river valleys in between ranges such as the Picos de Europa. Vertebral Asturian motorways have identifiers in the style of national ones, that is, white text on blue background, while roads in process of upgrading keep their old nomenclature until the full route is completed. Such is the case, for example, with the AS-III, which is an upgrade of the AS-17. The prefix is always AS, and Roman numerals are used. *: planned/in construction Balearic Islands All of the roads in the Balearic Islands were transferred to the regional government when the Autonomous Community was formed, and several are now under the competence of the several Island Councils (Consell Insular). The prefix denotes the island, and the second letter (if any) is lowercase. Autopista identifiers are white on blue background, while twinned roads closer to the autovía category keep their identifiers. Basque Country A special case together with Navarre, the Basque Country has received full powers over most roads in its territory, including the national roads that comprised the primary network, and nowadays only the AP-1 and the AP-68 are under the direct authority of the Spanish government as part of the Red de carreteras del Estado (National Road Network). Currently, roads are managed by the three Diputaciones Forales of the Basque provinces. The fact that such transfer took place before the thorough renaming of national roads and highways in 2003 makes the naming of transferred "national" highways inconsistent with the national network: the A-1 is still called the N-I in the Basque Country, and the same identifier (A-8) applies to the tolled and toll-free parts of the Autopista del Cantábrico in Biscay. Furthermore, new highways built since then by the provinces have one of the following prefixes: A for Álava-Araba, BI for Biscay (Vizcaya-Bizkaia) or GI for Guipúzcoa-Gipuzkoa. *: in construction — †: planned Canary Islands Following the example of the other insular community in Spain, all roads in the Canary Islands are under the authority of either the regional government or one of the