Situated in a valley and surrounded by mountain ranges, Tegucigalpa is hilly with several elevations and few flat areas.  The city is also highly disorganized, particularly around its oldest districts. It has seen a rapid growth in the last 30 years, and only recently has the government passed some of the laws establishing city planning and zoning rules.  Surface roads can be narrow with the most important avenues carrying no more than two or three lanes running in each direction, adding to the problem of heavy traffic congestion.  Several of the main boulevards have been equipped with interchanges, overpasses and underpasses, allowing for sections of controlled-access highways, but considering that even the city's beltway does not entirely circle the city, the roads are generally limited-access.  Intense webs of electrical and telephone lines above the streets are a common sight in the capital, and in virtually all Honduran cities, since implementation of underground utility lines has only been adopted in recent years.