21.   Westbound lanes of the highway were closed for about five hours.

a. + lane >>共 299
shipping 9.00%
passing 6.97%
narrow 5.95%
left 3.12%
right 2.76%
slow 2.61%
northbound 2.39%
southbound 2.39%
opposite 2.25%
outside 1.89%
westbound 1.52%
westbound + n. >>共 27
lane 31.34%
train 16.42%
traffic 8.96%
carriageway 5.97%
flight 2.99%
freight 2.99%
barge 1.49%
bus 1.49%
call 1.49%
closure 1.49%
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