A 31-year-old man from the Isle of Man has been arrested in the UK on suspicion of death by dangerous driving.
Lancashire police said he's being held in custody after a 74-year-old woman died in a car crash on the Heysham M6 link road.
The accident took place just before 13:00 on Wednesday on the eastbound stretch of the road which connects the Lancaster and Morecambe area to the M6 motorway.
Sgt Phil Baxendale of Lancashire Police’s Tactical Operations, said: "These are very sad and tragic circumstances and my thoughts are with the family of the woman involved at this time.
" We are appealing for information and urging any witnesses to come forward. There were a number of vehicles travelling close to the incident at the time and although several drivers stopped to speak to us, there are others that may have dashcam footage leading up to the collision which may prove vital to the investigation, so we are asking those to get in touch as well.
"We believe a third vehicle, a BMW, was possibly involved in the incident and we are particularly interested in speaking to anyone who might information about this, including the driving manner of the vehicles described".
Anyone with information can contact police on 101 or email 2957@lancashire.police.uk quoting log 0625 of August 4.
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