Resident have branded the junction between Witham-on-Hill and Manthorpe as a "death trap."
A new speed camera has been installed to replace an older model in Stamford.
Drivers are facing more delays after a two-vehicle crash blocked A1 at Wansford.
Police also report man fled scene of earlier incident at Colsterworth.
Drivers on the A1 northbound are facing delays for the third in less than 24 hours.
The A1 was closed last night after a seven vehicle crash at Colsterworth.
Dual-carriageway partially blocked due to accident.
Passengers are being warned of delays on both the Midland Main Line and East Coast Main Line because of a risk of track buckling.
Road set to be affected until Wednesday.
There was congestion on surrounding roads as the traffic diverted around.
Organisers of event say they never cancel
Work is expected to take three days to complete.