分析ACCESSIBILITY机动性和可达性.ppt
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1、 1.4 Basic Concepts in Traffic EngineeringnMobility versus Accessibility(机动性和可达性) nHighway Classification (道路分类) nUninterrupted (连续流)and Interrupted (间断流)flows nResponsibility and Liability (责任与义务)nTransportation Legislation (交通立法)nMobility (机动性) - refers to the ability to travel to many different d
2、estinations, while accessibility (可达性) - refers to the ability to gain entry to a particular site or area With an increase of mobility the ability to access development decreases, and vise versa. Mobility versus AccessibilityGraphic description between mobility and accessibilityHighway classificatio
3、n nLocation - urban and suburban (rural)nCriterion - specification for roadway designnEach country has different way in determining hierarchy of highwaysThe purpose of conducting classification for highway is to clarify the functionality of each category of roadways in providing services in terms of
4、 mobility and accessibility With increase of mobility the accessibility will decrease Freeway has the highest mobility; whereas local street has thehighest accessibilitynFreeways or expressways - access-controlled, multilane, divided highways devoted to high-speed, long-distance travel with little o
5、r no access adjacent to landnArterials - roadways serving primarily to move traffic between principal traffic generators with partially access-controlled (residential access is discouraged, but commercial access is allowed), there are two categories: major and minornCollectors - roadways serving int
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- 分析 ACCESSIBILITY 机动性 可达性