A new bus and cycle lane is now in place near the TT Grandstand on Glencrutchery Road.
The new road layout was finished earlier today by the Department of Infrastructure.
As a result, Police are asking motorists to make sure they get acquainted with the new system next time they go there.
The constabulary adds to be aware of other road users who may be travelling along it for the first time.
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Your plaice or mine? None next year, say scientists!