Concerns have been raised that the green light given to a 70-home development at Colsterwroth could prevent the A1 being turned into a motorway.
Services on the East Coast Main Line are delayed or cancelled following the incident.
A yellow weather warning for rain is in place as busy Grantham roads struggle to cope with the volume of water.
Work on two junctions in the town has been completed after years of wear and tear.
Bypass project moves a step closer to completion as ground is broken.
Collision near Grantham brought traffic to a halt.
A vintage vehicle society will give free rides on Tilling's buses from Grantham bus station.
Motorcyclists account for a quarter of all county's road deaths this year
Anglian Water has carried out repairs to manhole covers
Road is closed between North Witham and Colsterworth for overnight roadworks.
Lincolnshire Police said the women had been taken to the Queen's Medical Centre in Nottingham.