retired policeman spencer bell , 71 , had bravely ventured on to the motorway near watford , hertfordshire , after a man fell from a bridge in january last year .
a court was told she had tried to avoid a queue of traffic that had built up by veering into the outside lane at up to 88mph .
last week mrs shahzad , 32 , pleaded guilty at st albans crown court to causing mr bell 's death .