There is a considerable difference between the road network and infrastructural development of the two city parts. Buda, the older part, produces constant crowding and traffic jams with its one-way streets and hilly parts. Due to the growing number of cars in the city, the drivers can expect continuous bumper-to-bumber situations on the Pest side as well. The road network of Pest was designed according to an overall plan which is based on the three semi-circular thoroughfares which start at the Danube on the North and end also at the Danube on the South. There are a number of interstecting straight avenues. The nine Danube bridges provide permeability between the city parts.