More informal ad hoc ridesharing programs include slugging (also known as casual carpooling). Rideshare encourages the use of the local public transit, as well as carpooling and cycling. Rideshare services to promote carpooling and vanpooling are operated by ZIMRIDE and VRIDE. Carpooling and bicycling to the festival are encouraged. Commuter vans are used as an alternative to carpooling and other ride sharing arrangements. Carpooling, flexcars, Smart cars, and shorter commutes could all reduce fuel use. These lanes are meant to improve traffic flow by encouraging carpooling and transit use. The local government sponsors carsharing and carpooling initiatives such as "Autodelen" and "Meerijden.nu". The center also serves as a Park and Ride facility for carpooling commuters. Since 2006, driving alone increased at the expense of carpooling and public transportation. HOV lanes can create strong practical incentives for carpooling by reducing travel time and expense. The impact on carpooling and non-motorized transportation, however, was found to be positive. This gives carpooling extra flexibility and enables more people to share journeys and save money. The unofficial "Indian Blockade" forced Nepalese to ride bicycles and also carpooling. Many companies and local authorities have introduced programs to promote carpooling.