21.   Authorities have said they hope to restore the tunnel to limited car traffic by December, but it will likely remain closed to trucks until spring.

22.   But even leaving has proved hard, with ferries, car traffic and most trains down.

23.   But this week Beijing for the first time bowed to rising car traffic and declared one busy street a bicycle-free zone.

24.   Car traffic resumed in March.

25.   Car traffic in the city center is restricted in an effort to keep smog at low levels.

26.   Car traffic resumed three years later, in March.

27.   For the Olympic plan to work, they say, ordinary car traffic must dwindle.

28.   He said the crossing would initially open to car traffic and that trucks would be allowed in at a later date.

29.   Heavy trucks will not be able to begin using the tunnel until several weeks after it reopens to car traffic.

30.   Most recently, officials from both France and Italy said the tunnel would not reopen to car traffic before mid-January.