1.   Already, the security perimeter around the White House has been expanded and vehicle traffic on adjacent streets halted indefinitely.

2.   As part of that plan, the regional council estimates how vehicle traffic will affect air pollution.

3.   But overpasses and underpasses will be used to keep vehicle traffic flowing smoothly.

4.   Last weekend, President Bill Clinton cited security reasons in announcing the immediate closing of Pennsylvania Avenue to vehicle traffic.

5.   Not only would the capacity for vehicle traffic become drastically limited, but access to the businesses and parking would be diminished.

6.   On game days, all vehicle traffic is closed down around the park.

7.   Pipes can also be damaged by the tremors from nearby subway lines, the pressure of vehicle traffic from above, and by the rate of water use.

8.   Ruckdeschel and other environmentalists say a master plan would provide directives for less vehicle traffic and better wildlife management.

9.   The double-track rail line would run in its own lanes, separate from vehicle traffic.

10.   The road is blocked off with boulders in the wintertime to protect the new growth, the watershed and the road surface from vehicle traffic.