The westbound shipping lane currently ends at the relatively shallow continental shelf, where ships disperse.
Westbound passengers will have to use a temporary staircase on Swanston Street until refurbishment work is completed.
Traffic on the opposing westbound carriageway was also affected as drivers slowed down to look, they said.
The crash happened on the westbound exit slip road at junction 16 at about 19:30 GMT on Thursday.
An earlier incident involving two jack-knifed lorries at junction six westbound on the island has now been cleared.
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The crash caused long delays, with westbound traffic being diverted along the A11.
The eastbound gates are in addition to those near Bowes in County Durham closing the A66 off to westbound traffic.
In 1932, Scottish aviator Jim Mollison made the first westbound transatlantic solo flight, from Portmarnock, Ireland, to Pennfield, New Brunswick.
Network Rail has reopened the westbound track which was closed at Teignmouth.
In Texas, the Department of Transportation closed portions of westbound I-40 from outside from Amarillo to Albuquerque, New Mexico, because of blizzard conditions.
One eastbound train derailed, coming to rest in the path of a westbound train that sideswiped it, damaging several cars and tearing up rails.
One person died and five others were injured in the crash on the westbound A14 between junctions 36 and 35, shortly after 07:00 GMT.
The new westbound lane would extend three miles past the continental shelf, and contain traffic to a defined area over the whale feeding grounds.
The A14 westbound was re-opened shortly after 16:00 GMT, police said.
He was at an exit in Ronkonkoma almost home around 1:45 a.m. when another driver came barreling at him westbound, the wrong way, he said.
Travelling westbound, the first eye-widening moments come over what must be one of the most scenic breakfasts in existence, as the train moves from wide-open plains and into the Rockies.
Transport Scotland, which is managing the project, said an overhead bridge, giving access to the westbound platform via stairs or a lift, would be installed later this summer.
The westbound lanes of the bridge were closed as officers investigated the cause of the deadly fire, but the patrol said one lane of traffic reopened early Sunday.
In the second crash, about 20 minutes later, a car crashed down an embankment on the westbound side between Junction 34 at Miskin and Junction 35 at Pencoed.
The attorney representing the engineer on the westbound train said other railroad employees have described repeated calls to replace the joint at the site of the derailment since early this year.
WSJ: Probe of Metro-North Derailment in Connecticut Focuses on Rail
The pink, rectangular icon on the computer screen representing the progress of PATH train 5780 blinked, as the cars rolled out on the westbound tracks from the World Trade Center station.
One lane of the M4 westbound, in the same place, will be shut on Tuesday and Wednesday night to create a safety zone while work is carried out on the central reservation.
Just 20 seconds elapsed between the time the first train came to rest and the moment it was struck by the westbound train, whose engineer had deployed emergency brakes to slow the train.
WSJ: Probe of Metro-North Derailment in Connecticut Focuses on Rail
Delta will run one daily flight in each direction, with the eastbound flight leaving Newark's Liberty Airport at 6:50 p.m. local time, and the westbound flight departing Charles DeGaulle Airport at 1:30 p.m. local.
Using interviews, inspections of wreckage and reviews of maintenance data, NTSB investigators have determined that the first, eastbound Metro-North train derailed and came to a stop in the path of an approaching westbound train.
WSJ: Probe of Metro-North Derailment in Connecticut Focuses on Rail
Then about 20 minutes after that police and fire crews were called to the westbound lane between Junction 36 at Sarn and Junction 37 at Pyle, where a car had gone in to trees.
"We had to creep by because, you know, it was just so much smoke and to keep us from getting in a wreck, and we were on eastbound and that was in westbound, " Strickland said.
There were also problems on the A47 westbound at East Tuddenham near Dereham, the A11 northbound at Wymondham, the A140 Norwich to Ipswich Road at Dunston Hall and the A148 Norwich to Holt Road at Letheringsett.
Power was shut off along the line and service has been halted -- westbound past Bridgeport, which is about 60 miles northeast of New York City on the Long Island Sound, and eastbound beyond South Norwalk -- because of the derailment.
Those trailers, in turn, can only cross from New Jersey to Staten Island by completely closing the westbound lanes of the Goethals Bridge, moving one at a time over the span at a maximum speed of 5 mph, Ms. Burtis said.
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