How is Road Routing Information represented?
Information that may affect a driver’s choice of route is represented by additional features that reference the base network. this is known as Road Routing Information (RRI). These features describe restrictions, permissions and other information relevant to drivers. The routing information is not applied to the base network, but is referenced. This allows the range of information collected to be extended in the future and minimises the impact on customers not concerned with routing information. The main categories of information captured are as follows: One way, no entry, no turn, mandatory turns,access prohibited and access limited to (to whom the restrictions apply and any time constraints are also captured), height, width and weight restrictions, fords, mini roundabouts, traffic calming, gate, tolls, bridge over road, firing range, through route, severe turn.
