Let me show you a map.
Image in courtesy of Google Maps
On the map, the red line and the blue line together is the daily route I drive from Xujiahui to the elevated highway (then my home is just 10 kms or 20 minutes away).
Today, since there is a small detour at the starting of the blue line – the road was completely blocked and no cars are allowed to enter. Then to to go to the entrance of the elevated highway, I used the red line plus the green line.
Look at how far I went just to workaround the detour.
This is due to the complicated one-way system in this area. For example, at the immediate next cross road, the Wanping Road 宛平路 is a single way road that I cannot turn right (one block south, it is both way). Then I have to go the next block. I turned right. I should have the opportunity to get back to the blue line, but there is another single way road, so I have to continue until I get to the elevated highway.
Turning right, on the whole way, there was no opportunity to make U-turn or left turn, until I reached the Tianyaoqiao Road. I turned left (no U-turn allowed), and went to a residential area. Enter that area and get out, so to do the U-Turn, and then run a long way back.
After I am back to the elevated highway, 40 minutes already past.
What a day.
P.S. Many car drivers can save this 40 minutes by some “tricks”, like make U-turn when it is now allowed, or even make U-turn when left turn is not allowed. Most people did. I followed the rule, and that is the result. It seems the policeman didn’t notice this at all, since they thought “smart” people workaround this anyway.