Course series No.000211 Grade No.030461 2007年度“交通工程总论”试题(B卷) 姓名 学号 分数 Part One--Answer the questions in simple way(简答题)（每题3分） l.What is the free flow speed?(何谓自由流速度？) 2.What is the difference between AADT and ADT?(年平均日交通量与平均日交通量有何 区别？) 3.What are the definition of 15th percentile speed and its meaning in traffic engineering? 分之十五位车速的定义和在交通工程中的含义是什麽？) 4.What are the protected left turn phase and permitted left turn phase?(何谓保护型和许可型 左转相位？) 5.What does the peak hour factor tell and what is its range in value?(高峰小时系数反映了 什麽？其值落在什麽范围？) 6.What is critical gap?(何谓临界可接受间隙？）
Course series No. 000211 Grade No. 030461 2007 年度“交通工程总论”试题 （B 卷） 姓名 学号 分数 Part One --- Answer the questions in simple way (简答题) (每题 3 分) 1. What is the free flow speed? (何谓自由流速度？) 2. What is the difference between AADT and ADT? (年平均日交通量与平均日交通量有何 区别？) 3. What are the definition of 15th percentile speed and its meaning in traffic engineering? (百 分之十五位车速的定义和在交通工程中的含义是什麽？) 4. What are the protected left turn phase and permitted left turn phase? (何谓保护型和许可型 左转相位？) 5. What does the peak hour factor tell and what is its range in value? (高峰小时系数反映了 什麽? 其值落在什麽范围？) 6. What is critical gap? (何谓临界可接受间隙？) 1
Course series No.000211 Grade No.030461 7.What is warning sign'?Give two examples of it.(何谓警告标志？请举出2个例子) 8.What is saturation headway?(何谓饱和车头时距？) 9.If rate of flow equals to hourly volume,what does it indicate?(如果小时流率与小时流量 相等，这说明什麽？) l0.Using diagram to show merge and diverge areas of freeway.(用图表示高速路合流区和 分流区) PartTwo--Elaborate the following questions(详述下列问题)（每题6分） 1.Describe the relationship between mobility and accessibility.Then,take Jing Jin freeway and Da Wang roadway as candidates to show their difference in terms of mobility and accessibility(描述机动性与可达性之间的关系，并以京，津高速路和大望路为例加以说 明) 2.lustrate the difference between the stop sign and yield sign.(试说明停车标志和让行标志 之间的区别) 2
Course series No. 000211 Grade No. 030461 7. What is warning sign? Give two examples of it. (何谓警告标志? 请举出 2 个例子) 8. What is saturation headway? (何谓饱和车头时距?) 9. If rate of flow equals to hourly volume, what does it indicate? (如果小时流率与小时流量 相等, 这说明什麽?) 10. Using diagram to show merge and diverge areas of freeway. (用图表示高速路合流区和 分流区) Part Two --- Elaborate the following questions (详述下列问题) （每题 6 分） 1. Describe the relationship between mobility and accessibility. Then, take Jing Jin freeway and Da Wang roadway as candidates to show their difference in terms of mobility and accessibility (描述机动性与可达性之间的关系, 并以京，津高速路和大望路为例加以说 明) 2. Illustrate the difference between the stop sign and yield sign. （试说明停车标志和让行标志 之间的区别） 2
Course series No.000211 Grade No.030461 3.Illustrate the basic principles used for signalization of intersections in MUTCD. MUTCD中有关在交叉口采用信号灯的基本原则) 4.Describe the merit and demerit of traffic signal control.(描述交通信号控制的优缺点) 5.List all factors affecting free-flow speed of multilane highways.(列出影响多车道公路自由 流速度的因素)
Course series No. 000211 Grade No. 030461 3. Illustrate the basic principles used for signalization of intersections in MUTCD. (叙述 MUTCD 中有关在交叉口采用信号灯的基本原则) 4. Describe the merit and demerit of traffic signal control. (描述交通信号控制的优缺点) 5. List all factors affecting free-flow speed of multilane highways. (列出影响多车道公路自由 流速度的因素) 3
Course series No.000211 Grade No.030461 PartThree-Calculations(计算题) l.Given the relationship between speed and density(已知速度与密度的关系) S=50(1-0.004×D),(5分) (a)Find the free-flow speed and jam density(求自由流速度和阻塞密度) (b)Derive equations describing flow versus speed and flow versus density(给出流量-速度，流 量密度关系式) (c)Determine the capacity mathematically(确定此时的通行能力) (d)Sketch the speed-density,flow-speed and flow-density curves and indicate the congested and uncongested area..(绘出速度-密度，流量-速度，流量-密度曲线并指出拥挤区和非拥挤区) 2.With what minimum reaction time will the car not hit the stopped truck when this car runs at speed of 120 km/h and driver sees the stopped truck at distance of 200 meters far.The grade of roadway is zero and the coefficient of forward friction is 0.40.What will happen if the distance is 140 meters (when driver sees the stopped truck)assuming the other conditions unchanged and explain??(一辆以每小时120公里行驶的汽车在200米处发现停靠在路上 的卡车，请问，小车司机最小的反应时间为多大时才不会撞到该卡车。道路纵坡为零 且车轮与路面的粘着系数为0.40。如果小车司机发现卡车时，距离卡车为140米，在 其他条件不变的情况下，会发生什麽并给出解释)(10分) 3.The traffic volume of roadway is 720 vph and its headway is distributed in the form of
Course series No. 000211 Grade No. 030461 Part Three --- Calculations (计算题) 1. Given the relationship between speed and density ( 已知速度与密度的关系 ) S D =− × 50(1 0.004 ) , (5 分) (a) Find the free-flow speed and jam density (求自由流速度和阻塞密度) (b) Derive equations describing flow versus speed and flow versus density (给出流量-速度，流 量-密度关系式) (c) Determine the capacity mathematically (确定此时的通行能力) (d) Sketch the speed-density, flow-speed and flow-density curves and indicate the congested and uncongested area. (绘出速度-密度，流量-速度，流量-密度曲线并指出拥挤区和非拥挤区) 2. With what minimum reaction time will the car not hit the stopped truck when this car runs at speed of 120 km/h and driver sees the stopped truck at distance of 200 meters far. The grade of roadway is zero and the coefficient of forward friction is 0.40. What will happen if the distance is 140 meters (when driver sees the stopped truck) assuming the other conditions unchanged and explain? (一辆以每小时 120 公里行驶的汽车在 200 米处发现停靠在路上 的卡车，请问，小车司机最小的反应时间为多大时才不会撞到该卡车。 道路纵坡为零 且车轮与路面的粘着系数为 0.40 。 如果小车司机发现卡车时，距离卡车为 140 米，在 其他条件不变的情况下，会发生什麽并给出解释) (10 分) 3. The traffic volume of roadway is 720 vph and its headway is distributed in the form of 4
Course series No.000211 Grade No.030461 exponential equation.Estimate:(已知某条路的交通量为720辆/小时，且车队车头时距 符合负指数分布，求(10分) (1) Number of headway whose value is no less than 5 second within an hour. (一小时内，车头时距不小于5秒的车头时距个数) (2) The number of the headways between 15 seconds and 20 seconds within two hours.(两小时内，车头时距介于15秒和20秒之间的车头时距个数) 4.Given the conditions of a two-way stop intersection as shown below.(已知二路停车交叉口 的流量分布情况，如下图所示) No. STO 500 600 20 80 STOP No.2 No.3 Calculate the potential capacity of(计算可能通行能力)(I0分) 1)Eastbound left turn movement (No.1),with critical gap 3 seconds and follow-up time 2.5 seconds(向东方向左转，其临界间隙为3秒，随车时距为2.5秒) 2)Northbound left turn movement (No.2),with critical gap 4 seconds and follow-up time3 seconds(向北方向左转，其临界间隙为4秒，随车时距为3秒) 3)Northbound through movement (No.3)with critical gap 3.5 seconds and follow-up time2.5 seconds(向北方向直行，其临界间隙为3.5秒，随车时距为2.5秒)
Course series No. 000211 Grade No. 030461 exponential equation. Estimate: (已知某条路的交通量为 720 辆/小时，且车队车头时距 符合负指数分布， 求 (10 分) (1) Number of headway whose value is no less than 5 second within an hour. （一小时内，车头时距不小于 5 秒的车头时距个数） (2) The number of the headways between 15 seconds and 20 seconds within two hours. （两小时内，车头时距介于 15 秒和 20 秒之间的车头时距个数） 4. Given the conditions of a two-way stop intersection as shown below. (已知二路停车交叉口 的流量分布情况，如下图所示) Calculate the potential capacity of （计算可能通行能力）(10 分) 1) Eastbound left turn movement (No.1), with critical gap 3 seconds and follow-up time 2.5 seconds （向东方向左转，其临界间隙为 3 秒，随车时距为 2.5 秒） 2) Northbound left turn movement (No. 2), with critical gap 4 seconds and follow-up time 3 seconds （向北方向左转，其临界间隙为 4 秒，随车时距为 3 秒） 3) Northbound through movement (No. 3) with critical gap 3.5 seconds and follow-up time 2.5 seconds （向北方向直行，其临界间隙为 3.5 秒，随车时距为 2.5 秒） 80 50 40 50 20 500 600 10 No.1 No. 2 STOP STOP No. 3 5
Course series No.000211 Grade No.030461 5.Based on the survey conducted at a busy bus stop,it is found that the probability of each bus having a crash from 6:00am to 6:00pm is 0.0004.The average volume of buses arriving at this stop from 6:00am to 6:00pm is 2500.Estimate the probability of having no less than 3 crashes from6:00amto6:00 om at this stop.(根据公交车站调查，发现公共汽车在早6： 00至晚6：00发生事故的概率为0.0004。早6：00至晚6：00公交车流量为2500，计 算从早6：00至晚6：00公交车发生3起及以上事故的概率)(5分) 6
Course series No. 000211 Grade No. 030461 5. Based on the survey conducted at a busy bus stop, it is found that the probability of each bus having a crash from 6:00am to 6:00pm is 0.0004. The average volume of buses arriving at this stop from 6:00am to 6:00pm is 2500. Estimate the probability of having no less than 3 crashes from 6:00am to 6:00pm at this stop. （根据公交车站调查，发现公共汽车在早 6： 00 至晚 6：00 发生事故的概率为 0.0004。早 6：00 至晚 6：00 公交车流量为 2500， 计 算从早 6：00 至晚 6：00 公交车发生 3 起及以上事故的概率）(5 分) 6