The Buenos Aires Metrobus is a 50.5 km (31.4 mi) network of dedicated separated lanes and stations for normal buses that serve the city of Buenos Aires, Argentina. Designed as a Bus Rapid Transit system, it mixes a few bi-articulated buses with conventional buses. The headway is the same as before the implementation of the system, and it lacks the brand of the network in the buses that use it, maintaining their previous branding as common bus lines with their own numbers. The service operates 24 hours a day and 365 days a year, with 2-4 minute frequencies during the day and 10-15 minutes at night.