Once again we have a classic example of one of the many myths surrounding the Battle of Arnhem aka Operation Market-Garden. The truth of this battle IS NOT to be found in the movie 'A Bridge to Far'. That movie was a huge distortion of the actual events and largely to blame for the continued discussions about the battle on this forum and elsewhere.
"The worst mistake of the Arnhem plan was the failure to give priority to capturing the Nijmegen bridge. The capture would have been a walkover on D-Day (Day one of Market-Garden), yet the 82nd Airborne Division could spare only one battalion as they must at all costs secure the Groesbeck heights where the Corps HQ was to be sited" Major-General John Frost
I take nothing away from the bravery of the men in the 82nd but the fact is they wasted 36 hours securing their drop zone and gave little thought to actually securing their objective, the bridge(s), until it was to late. They landed in gliders so why didn't they land at both ends of the bridge on D-Day rather than have to wait for the British to bring up some boats from down the line. The congested traffic largely due to the fact that the bridge was still not taken after 36 hours and the following vehicles etc were backed up.