Abstract In July 2003 a new Road Code was approved by the Italian parliament. Among other changes, the law states that on three-lane motorways the right lane should not be reserved anymore to slow vehicles. The model developed in this paper casts doubts on the wisdom of such a change, suggesting...

In July 2003 a new Road Code was approved by the Italian parliament. Among other changes, the law states that on three-lane motorways the right lane should not be reserved anymore to slow vehicles. The model developed in this paper casts doubts on the wisdom of such a change, suggesting that...

In July 2003 a new Road Code was approved by the Italian parliament. Among many reforms whose validity is not questioned here, the new law states that on three-lane motorways the right lane should not be reserved anymore to slow vehicles alone. As in two-lane roads, all vehicles must now drive...

Similar to many sub-Saharan African countries, Sudan has inherited a dual economy in the immediate post-independence era where a large agriculture-based rural traditional sector coexisted with a small non-agricultural modern sector. This functional dualism remained until the first oil shipment...