SIR - Who can forget the mayhem on the roads when we last suffered a major concert at Knebworth Park? We can only hope that the responsible authorities have equal memories and have learnt some lessons. A single carriageway (or entrance) will only have a c

SIR - Who can forget the mayhem on the roads when we last suffered a major concert at Knebworth Park? We can only hope that the responsible authorities have equal memories and have learnt some lessons.

A single carriageway (or entrance) will only have a capacity for 3,600 cars per hour at an interval of one second, and the normal safe number is two seconds. Last time, we were told that they expected 30,000 cars. Since the majority of those tried to come on the Friday evening, it was not surprising that the motorway was jammed for many miles in both directions at the time. Some ticket holders never got to the event.

In addition, the trouble was initiated at the pinch point at the entrance to Knebworth Park where the conflux of cars and pedestrians was grossly under-estimated. The resulting traffic chaos in Stevenage spread throughout the town.

No doubt the various concerns have got together to solve these problems.

But I am not holding my breath and not going out over the weekend of July 5.

L S J SHIPP

Woodfield Road

Stevenage