Police are warning TT fans to make sure they leave plenty of time to get to vantage points today.
The first day of racing always sees a significant rise in traffic on the Island.
On Facebook, officers say it's expected to be extremely busy on the roads this morning.
Their advice is to set off early, and to take extra care on the roads.
Northern bus services to be raised in Keys
Ben out of service for maintenance work this week
Richmond Hill closed again tonight for work
October warmer and sunnier than usual, says Met Office
MHK queries cost of Liverpool awards trip
DOI says it has 20 empty public sector homes
Marquee plan submitted by Milntown Estate
Fire crews called to free driver from crashed car