The main routes into Budapest are the M1 from Vienna (via Győr), the M3 from near Gyöngyös, the M5 from Kecskemét, and the M7 from the Balaton; the M3 and M5 are being upgraded and extended to Hungary's borders with Slovakia and Yugoslavia, respectively. Budapest, like any Western city, is plagued by traffic jams during the day, but motorists should have no problem later in the evening. Motorists not accustomed to sharing the city streets with trams should pay extra attention. You should be prepared to be flagged down numerous times by police conducting routine checks for drunk driving and stolen cars. Be sure all of your papers are in order and readily accessible; unfortunately, the police have been known to give foreigners a hard time. Don't rent a car on arrival if your sole destination is Budapest, but it may be worthwhile to have one if you want to explore the countryside.