A northbound lane was closed while officers helped with several broken down vehicles on the A1.
Passengers talk of 'hot' conditions in trains brought to a halt - one in the Peascliffe tunnel.
Overhead wires damage near Grantham causes severe disruption.
Lincolnshire Police were called to a road traffic collision near the A607 junction on Saturday at 3.07pm.
Teenager in hospital following crash.
Highways England warns of heavy delays for motorists.
A 'near normal' service is planned for Nottingham-Grantham-Skegness trains.
Resident says it is 'unacceptable' for road to be closed for so long
Major delays on East Coast main line
Southbound carriageway now clear
Passengers urged to be prepared for service disruption