Ability to pass on such street is in San Francisco, which is known to be standing on the hills .... And there in the city Lombard #Street (Lombard Street). Moreover, it is a 27-degree hill, so it still has eight "critical" turns. #Lombard Street (San Francisco). Of course, the curved section is only part of the entire #road. The speed limit on it only 5 miles / hour (8 km / h), and can only go down. On both sides of the road are the most expensive mansions in San Francisco.
The road was built in such a strange way, long ago, because the first vehicles due to the weakness of the engines could not cope with 27% slope. Yes, and pedestrians to climb is not very convenient. In 2001, local authorities had almost closed it to vehicles, but, on reflection, decided to move one way - from the top down and to limit and prohibit parking.
