1、Design of At-grade Intersection,2011.4.7,Concept,At-grade intersection： is a junction at which two or more transport axes cross at the same level (or grade). Grade separation is the process of aligning a junction of two or more transport axes at different heights (grades) so that they will not disru

2、pt the traffic flow on other transit routes when they cross each other. Interchange is a road junction that typically uses grade separation, and one or more ramps, to permit traffic on at least one highway to pass through the junction without directly crossing any other traffic stream.,Design specif

3、ication,城市道路交叉口規(guī)劃設(shè)計(jì)規(guī)范 (Planning and design specification for intersections on urban street),Traffic management,With areas of high or fast traffic, an at-grade intersection normally requires a traffic control devices such as a stop sign, traffic light or railway signal to manage conflicting traffic.

4、平面交叉口的交通組織方式，通過(guò)交叉口平面渠化布局來(lái)組織分配交叉口各相交交通流的通行路徑; 通過(guò)交通管理措施來(lái)組織分配相交交通流的通行次序; 平面交叉口平面布局方案應(yīng)包括車(chē)輛進(jìn)出口道及其渠化方案、行人過(guò)街橫道、公交路線和公交站點(diǎn)布置等； 交通管理措施應(yīng)包括減速讓行、停車(chē)讓行管制與交通信號(hào)控制等。,Types of at-grade intersection,In accordance with arrangement & traffic management and organization,Selection of at-grade intersection type,Range of at-

5、grade intersection,平面交叉口規(guī)劃設(shè)計(jì)范圍 平面交叉口規(guī)劃設(shè)計(jì)范圍是指構(gòu)成平面交叉口各條道路的相交部分及其進(jìn)口道、出口道，包括進(jìn)出口道展寬和漸變段以及行人、自行車(chē)過(guò)街設(shè)施所共同圍城的空間。新建或改建交通工程規(guī)劃中的平面交叉口規(guī)劃設(shè)計(jì)，須對(duì)交叉口范圍內(nèi)規(guī)劃道路及相交道路的進(jìn)出口道各組成部分作整體規(guī)劃，不得只做規(guī)劃道路的進(jìn)出口道組成部分的規(guī)劃而不顧相交道路進(jìn)出口道的規(guī)劃。,Design parameters-red line,交叉口進(jìn)出口道部位紅線寬度，應(yīng)按相應(yīng)的交叉口交通組織類型，按表確定比路段紅線須與展寬的寬度。,Design parameters-red line,-int

6、ersection angle 交叉口轉(zhuǎn)角部位紅線應(yīng)規(guī)劃成切角斜線或圓曲線，并必須滿足安全停車(chē)視距的交叉口視距三角形界限的要求，視距三角形界限內(nèi)，不得規(guī)劃布設(shè)任何高出平面標(biāo)高1.2m的物體，交叉口視距三角形視于圖。,Design parameters-red line,Stopping sight,Design parameters-design speed,交叉口機(jī)動(dòng)車(chē)設(shè)計(jì)速度應(yīng)按交叉口類型及取設(shè)計(jì)車(chē)速的規(guī)劃交叉口部位而定。,Design parameters-capacity,At-grade intersection with yield sign,Design parameters-c

7、apacity,At-grade intersection with yield sign,Design parameters-capacity,1,Design parameters-capacity,Design parameters-capacity,Design parameters-capacity,Signalized intersection,Design parameters-capacity,各車(chē)道的基本飽和流量,Design parameters-capacity,Design parameters-capacity,Roundabout,Design parameters

8、-capacity,Approaching of non-motor way,Design parameters-capacity,Pedestrian crossing,Alignment of at-grade intersection,Horizontal alignment,Alignment of at-grade intersection,Alignment of at-grade intersection,Horizontal alignment,Alignment of at-grade intersection,Vertical alignment,Alignment of

9、at-grade intersection,Vertical alignment,Alignment of at-grade intersection,Non-signalized intersection,Alignment of at-grade intersection,Signalized intersection,Alignment of at-grade intersection,Signalized intersection,Alignment of at-grade intersection,Approaching design,Alignment of at-grade in

10、tersection,Approaching design,Alignment of at-grade intersection,Leaving design,Alignment of at-grade intersection,Leaving design,Alignment of at-grade intersection,Roundabout,Alignment of at-grade intersection,Roundabout,Alignment of at-grade intersection,Roundabout,Alignment of at-grade intersection,Roundabout,Alignment of at-grade int