When traffic closes a road, the shortest navigation alternative can add stops, outdoor waiting or difficult receipt points. An alternative defined only by kilometres hides that operational impact, so build the route from time items:
- Write down the product range, the starting reading and the plate state.
- For the main and the alternative route, total driving, stops and receipt, waiting, door-open time and a safety allowance on separate lines.
- Define the condition for switching route, the decision time and the new stop order.
- Compare the total with the validated range and write down the remaining margin.
An alternative route should be a validated option prepared in advance, not improvisation during the event. If the remaining thermal budget is short, continuing the delivery is not decided automatically; the decision time is linked to the logger record.
