He said it was important for the restrictions to take into account the concentration of population near a store.

BBC: Sainsbury's Kelso store job application radius extended

"Rising fuel prices and the increasing concentration of the population in urban areas is bringing about serious logistical problems for the delivery of food, " he says.

CNN: Futuristic farm shop grows food in synthetic veg patch

The building of more freeways in relatively low-population areas will not solve the congestion problems in the cities where the concentration of buyers is located.

FORBES: China's Auto Industry Shows Signs Of Impending Gridlock