The Charts2-3 and 2-4 below separately explained the existingdistributionof Xi'anmunicipalcomprehensivetrafficnetworkand that of the externalroad communication.
Road-pricing has long been championed by economists, keen to impose more of the external costs of driving on road-users by charging them a fee that reflects not just the distance travelled (which is loosely what gasoline taxes do) but also the time and route of the journey.
An experimental section of road where an external computer can take over your car if you wish (and are suitably wired up) is now open in California to test the idea.
Property damage claims were analyzed over a two-year period (from January 2009 to December 2010) to ensure the findings would not be impacted by external influences such as weather or road construction.