Ready for a bit of nutrition science? Then read on...
For long drives, foods with a low or moderate Glycaemic Index will provide a steady rise in your blood sugar levels, giving a sustained release of concentration-boosting energy.
If youre making a short trip, on the other hand, then a high GI food is great for a quick energy boost.
A number of foods now have labels showing their GI levels, so take a look.
Rice Krispies, cornflakes, bagels, white bread, rice, pizza, potatoes (baked, mashed), chips, fizzy drinks (non-diet), raisins, chocolate bars.
All-Bran, muesli, porridge, noodles, spaghetti, pitta bread, digestive biscuits, potatoes (boiled), peas, carrots, baked beans, grapes, banana, orange, fruit juice.
Apples, dried apricots, kidney beans, lentils, milk, low-fat yoghurt, peanuts.