交通工程學(xué)習(xí)題答案

is one of the practical form of values. The so-called values refers to the objective things are of no value and the value of fundamental perspective. Different values, peoples behaviour, attitudes, ways are different. People-oriented focus on human value and reality, we need the broadest masses as values. Adhere to people-oriented values, is to make the economy more development, improve democracy, cultural prosperity, and live a happier; is deeply concerned that human development and human values, development of social and human development of rational unified, insisted in the material civilization, political civilization and spiritual civilization in the overall advancement of Socialist civilization to a higher level. Also want to see that persons value is not only meet your needs, also is to meet the needs of others and the community. Adhere to people-oriented, to strongly advocate every community member, serve others, beneficial to the community of people. The so-called Outlook, attitude is on the record, including who, how to create a record of achievements, how to evaluate performance, and so on. What values, what kind of Outlook. Adhere to people-oriented Outlook, is on the premise of respecting the interests and power of people, creating a popular, warm hearts, steady heart performance, creating serve for one officer, the benefit of achievements, and overall construction of well-off society and promoting the all-round development of peoples performance. Achievement evaluation in both economic accomplishments, take another look at the effectiveness of social progress; changes in both urban and rural change; both hard environment to strengthen and take another look at the soft environment improvement momentum of development at present, depending on the potential for sustainable development. Leave people to talk about values are worthless and leave people to talk about Outlook is not what the performance. 4. people responded to the starting point of the question, and replied to questions point. Man is the sum of social relationships. We cannot leave the chichuanyongdu, housing, tourism and entertainment, entertaining, and even certain political, economic, cultural and social environment, and so on. Due to human needs, all walks of life will come into being. People create for their survival, and continue enjoying the results of the construction. Colorful in the transformation of the people of the world, community vitality in the creation of man. Therefore, any work we do, the starting point is human, what are people. Us speed up development, the core of which is to meet the needs of people, including survival needs, emotional needs and self-actualization needs. It should be noted that people are not machines, not the slave of an object, not to be controlled. People have their own personality, has its own personality, has its own dignity. Person in need of care, you need to understand, need to meet. It is said that in the agricultural society, people plant; in industrial society, man is an animal; the information society, return交通工程學(xué)習(xí)題解習(xí)題2-1解： 小時(shí)交通量： 5min高峰流率： 15min高峰流率： 15min高峰小時(shí)系數(shù)： 習(xí)題2-2解：已知： 設(shè)計(jì)小時(shí)交通量： 車道數(shù)： 該道路需修6車道。 注：此題。 如果，。習(xí)題2-3解： 輛/h 車頭時(shí)距： s/輛 車頭間距： m/輛 車流密度： 輛/km 第一輛車通過時(shí)間： h習(xí)題2-4解: 習(xí)題3-1解：已知：t東=2.0 min， t西=2.0 min，X東=29.0 輛， Y東=1.5 輛X西=28.6 輛， Y西=1.0 輛1、先計(jì)算向東行情況： 2、再計(jì)算向西行情況：習(xí)題3-4解：總停駛車輛數(shù) = 28 + 25 + 38 + 33 = 124 輛 總延誤 = 12415 = 1860 輛s每輛停車的平均延誤 = 總延誤/停車輛數(shù) = 1860/113 = 16.46 s交叉口引道上每輛車的平均延誤 = 總延誤/引道上總交通量 = 1860/（113+119）= 8.02 s停車的百分?jǐn)?shù) = 停車輛數(shù)/引道上交通量 = 113/232 = 48.7%取置信度90%，則K2 = 2.70，于是 停車百分比的容許誤差 = 取置信度95%，則K2 = 3.84，于是 停車百分比的容許誤差 = 習(xí)題4-2解：已知：暢行速度；阻塞密度； 速度與密度為線性關(guān)系模型。 最大流量：因 輛/km km/h 輛/h。 此時(shí)所對應(yīng)的車速： km/h。習(xí)題4-4解：已知：N = 56，車輛到達(dá)數(shù)實(shí)測頻數(shù)0123456789011141195321056011283336251814801730.04550.14060.21720.22370.17280.10680.05500.02430.00940.00322.5487.87312.16312.5279.6775.9813.0801.3600.5250.180 對于泊松分布，把小于5的進(jìn)行合并，并成6組，可算出 由DF=6-2=4，取，查表得： 可見此分布符合泊松分布。習(xí)題4-5解：已知：交通流屬泊松分布，則車頭時(shí)距為負(fù)指數(shù)分布。交通量，。 車頭時(shí)距的概率： 車頭時(shí)距時(shí)出現(xiàn)的次數(shù)： 次數(shù)為：（輛/h）。 車頭時(shí)距時(shí)車頭間隔的平均植：車頭時(shí)距 頻 率頻 數(shù)此時(shí)段到達(dá)的車輛數(shù)61624671163388323960171043121131912226131651411315821666平均值：習(xí)題4-9解：已知：Q=1500輛/h，每個收費(fèi)站服務(wù)量為600輛/h。 1按3個平行的M/M/1系統(tǒng)計(jì)算 ，系統(tǒng)穩(wěn)定。，而對于三個收費(fèi)站系統(tǒng)，2按M/M/3系統(tǒng)計(jì)算，系統(tǒng)穩(wěn)定。習(xí)題4-10解：已知：V1=50km/h，Q1=4200輛/h，V2=13km/h，Q2=3880輛/h，V3=59km/h，Q3=1950輛/h，t =1.69h1. 計(jì)算排隊(duì)長度 k1=Q1/V1=4200/50=84 輛/km，k2=Q2/V2=3880/13=298.5 輛/kmVw=(Q2Q1)/(k2k1)=( 38804200)/(298.584)= 1.49 km/hL=(01.69+1.491.69)/2=1.26 km2. 計(jì)算阻塞時(shí)間 排隊(duì)消散時(shí)間t 排隊(duì)車輛為：(Q1Q2)1.69=(42003880)1.69=541 輛疏散車輛數(shù)為：Q2Q1=19503880 = 1930 輛/h則排隊(duì)消散時(shí)間： 阻塞時(shí)間：t= t+1.69 = 0.28 + 1.69 = 1.97 h習(xí)題5-1解：已知：，大型車占總交通量的30%， ，平原地形。查表5-3， 取設(shè)計(jì)速度為100km/h，二級服務(wù)水平，一條車道的設(shè)計(jì)通行能力：車道數(shù)： 故該高速公路修成6車道。習(xí)題5-2解：已知：L1=300m、R=0.286、VR=0.560、V=2500 pcu/h L2=450m、R=0.200、VR=0.517、V=2900 pcu/h第一段：計(jì)算非約束情況下的交織車速SW及非交織車速SnW 非約束情況下型式B的常數(shù)值如下： a b c d SW 0.1 1.2 0.77 0.5 SnW 0.02 2.0 1.42 0.95 利用式（5-8）計(jì)算 核查交織區(qū)段諸限制值： ， ， 確定服務(wù)水平：查表5-10， 屬于二級， 屬于二級。第二段：計(jì)算非約束情況下的交織車速SW及非交織車速SnW利用式（5-8）計(jì)算 核查交織區(qū)段諸限制值： ， ， 確定服務(wù)水平：查表5-10， 屬于三級， 屬于三級。習(xí)題5-3 北解：已知 T=60s，三相式固定周期。 大車小車 = 28，l = 0.1。 由題意分析可知，交叉口各進(jìn)口道的車行道區(qū)分為專用左轉(zhuǎn)和直右兩種。 西 東 計(jì)算直行車道的設(shè)計(jì)通行能力，用公式（5-23）。取t0=2.3s，=0.9。綠燈時(shí)間tg=(60-23)/3=18s。 據(jù)車種比例28，查表5-32，得ti=2.65s。將已知參數(shù)代入公式（5-23），則 南 計(jì)算直右車道的設(shè)計(jì)通行能力，用公式（5-24）： 各進(jìn)口屬于設(shè)有專用左轉(zhuǎn)車道而未設(shè)右轉(zhuǎn)專用車道類型，其設(shè)計(jì)通行能力用公式（5-30）計(jì)算： 該進(jìn)口專用左轉(zhuǎn)車道的設(shè)計(jì)通行能力，用公式（5-31）計(jì)算： 驗(yàn)算是否需要折減 因T = 60s，所以n = 3600/60 = 60，不影響對面直行車輛行駛的左轉(zhuǎn)交通量： 本題進(jìn)口設(shè)計(jì)左轉(zhuǎn)交通量，不折減。 交叉口的設(shè)計(jì)通行能力交叉口的設(shè)計(jì)通行能力等于四個進(jìn)口設(shè)計(jì)通行能力之和。因本題四個進(jìn)口相同，故該交叉口的設(shè)計(jì)通行能力為：對于圖2，南北進(jìn)口的設(shè)計(jì)通行能力計(jì)算如下： 北 計(jì)算直右車道的設(shè)計(jì)通行能力，用公式（5-24）： 計(jì)算直左車道的設(shè)計(jì)通行能力，用公式（5-25）： 西 東 驗(yàn)算北進(jìn)口左轉(zhuǎn)車是否影響南進(jìn)口車的直行 南，不折減。 交叉口的設(shè)計(jì)通行能力交叉口的設(shè)計(jì)通行能力等于四個進(jìn)口設(shè)計(jì)通行能力之和。因本題東西進(jìn)口相同，南北進(jìn)口相同，故該交叉口的設(shè)計(jì)通行能力為：主蒸汽管道和高溫再熱蒸汽管道分別從過熱器和再熱器的出口聯(lián)箱的兩側(cè)引出，然后匯成一根母管，到汽輪機(jī)前再分成兩根支管分別接入高壓缸和中壓缸左右側(cè)主汽關(guān)斷閥和再熱關(guān)斷閥。Now, we are in a new historical stage of all-round construction of a well-off society. In perform duties, and carried out work of process in the, we to put people as a guide principles, and a test standard, efforts from masses most hope do of things do up, from masses most care of hot problem grabbed, from masses most not satisfaction of place modified up, not make nominal of formalism, not do grandstanding of cosmetic, to seeking of style, help masses share, is people benefit. (C) the investee people is not only an idea, it is a job requirement. Philosophy through to the people-oriented thought in the work of the Office, must be clear work objectives. Party Office in the city this year remains: Advanced civil strife, local brand. The County (City) Party Committee offices and units directly under the Office to hold high the banner of first to excellence, people-oriented requirements, strengthen the construction and management of the Office towards the work a higher level. Investee 1. political participation based on conspiracy to adhere to people-oriented, will be around to promote coordinationDevelopment events, great searchings. The 16 session of the partys scientific Outlook on development, is the new Central collective leadership to the development of connotation, development essentials, further deepen the essence of development and innovation, is our partys ruling idea a leap. At present, establishing and implementing the scientific concept of development has become the partys important work. As the Office of party Committee, working party should service center, initiative to claim leadership of the decision, the current focus is to focus on promoting comprehensive, coordinated and sustainable development with more suggestions, do more research, summarized the typical. One is drafted to raise the level of your presentation. Your presentation is the main Office of products, is the basic carrier staff service, is important to measure service levels. The quality of your presentation, mainly depends on how much we drafted a document recognized by the leadership, how many are listening to the people in favour of the report, how many paid dividends in the practical work. Improve presentation drafting level, requ