Professor Alan McKinnon, director of Logistics Research at Heriot -Watt University, told delegates that at any given time, there is £460m worth of freight in transit on UK roads. Growing congestion, although often predictable and regular, can cost the industry a fortune in delays and can be very disruptive. He said food retailers attribute one third of delays to traffic congestion. Adapting logistics operations was possible to combat this. Options included; switching transport modes, off-peak scheduling, overhauling goods reception areas, and supply chain event management.