Cycling in Madrid shared-use paths. The most important shared-use path is Madrid Río, a park located in the banks of the Manzanares River and opened in 2011. Car-shared lanes and streets (in Spanish: ciclocalle o ciclovía) are very frecuent in Madrid. They are marked with the drawing of a bicycle on the pavement, and they are speed limited to 30 km/h. In Madrid, there are many bike sidewalk paths (in Spanish: acera-bici). Some are located in O'Donnell Street or Serrano Street. Greenways (in Spanish: pista-bici) are independent cycle routes, for example the Royal Route GR-124. BiciMAD is a public service of bicycle-sharing. It
Siege of Madrid as part of the Nationalist's campaign to take the capital: in March, at Guadalajara and at the end of December at Teruel, both north east of Madrid. In the first of these battles, in early 1937 Franco tried to cross the river Jarama to cut off the road between Madrid and Valencia, where the Republicans had moved their government. The battle's results were inconclusive. Franco's troops managed to get onto the east bank of the Jarama but failed to sever communications between Madrid and Valencia. Casualties on both sides were heavy, estimates of their losses ranging from 6,000 to 20,000