There are 2,880 km (1,790 mi) of highways in Equatorial Guinea, the majority of which were not paved in 2002. Equatorial Guinea's roads and highways are underdeveloped, but improving. During the rainy season, roads are frequently impassable without four-wheel drive vehicles. Bush taxis are the main form of transport in Equatorial Guinea. It is a type of shared taxi connecting Malabo with other major towns like Riaba and Luba. Bush taxis also run to Ebebiyin and Mongomo from Bata. They may be rented on a daily or hourly basis. Malabo can easily be explored on foot, but traditional cabs also operate within the city limits. Rates are more expensive at night. Minibuses are a common form of public transport in Equatorial Guinea. They tend to become overcrowded, but they are perfect for getting around and heading to the outskirts of Malabo and Bata. There are no passenger train services.