On urban roads, bicycle traffic should use cycle lanes, the roadway and specially adapted areas. "Specially adapted areas" means legally established, designated bicycle lanes, those where road signs allow cycling and those where there is some form of explicit authorisation.
In both directions on the road
These allow bicycles to travel in either direction. They are usually on the left-hand side of the road, seen from the direction of other road traffic (C. Calàbria, C. Marqués de Sentmenat, C. Urgell, C. Sicília, C. Provença, C. Teodor C. Llorente, etc.). This means that cyclists travelling in the opposite direction to motor vehicles are better protected. This type of lane can also be found in the middle of the roadway, like on Pg. de Sant Joan or Av. Paral·lel.
One way on the road
These can be with traffic flow (such as those on Av. Diagonal - Francesc Macià - Pg. de Gràcia, C. Diputació and C. Consell de Cent) or contra-flow, used especially in bicycle streets with 30 kph speed limits to allow contra-flow bicycle traffic. Ctra de la Bordeta and C. Jota are two examples.