交通工程學習題答案

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交通工程學習題解習題2-1解： 小時交通量： 5min高峰流率： 15min高峰流率： 15min高峰小時系數： 習題2-2解：已知： 設計小時交通量： 車道數： 該道路需修6車道。 注：此題。 如果，。習題2-3解： 輛/h 車頭時距： s/輛 車頭間距： m/輛 車流密度： 輛/km 第一輛車通過時間： h習題2-4解: 習題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、先計算向東行情況： 2、再計算向西行情況：習題3-4解：總停駛車輛數 = 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 = 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停車的百分數 = 停車輛數/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 = 習題4-2解：已知：暢行速度；阻塞密度； 速度與密度為線性關系模型。 最大流量：因 輛/km km/h 輛/h。 此時所對應的車速： km/h。習題4-4解：已知：N = 56，車輛到達數實測頻數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。習題4-5解：已知：交通流屬泊松分布，則車頭時距為負指數分布。交通量，。 車頭時距的概率： 車頭時距時出現的次數： 次數為：（輛/h）。 車頭時距時車頭間隔的平均植：車頭時距 頻 率頻 數此時段到達的車輛數61624671163388323960171043121131912226131651411315821666平均值：習題4-9解：已知：Q=1500輛/h，每個收費站服務量為600輛/h。 1按3個平行的M/M/1系統(tǒng)計算 ，系統(tǒng)穩(wěn)定。，而對于三個收費站系統(tǒng)，2按M/M/3系統(tǒng)計算，系統(tǒng)穩(wěn)定。習題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. 計算排隊長度 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. 計算阻塞時間 排隊消散時間t 排隊車輛為：(Q1Q2)1.69=(42003880)1.69=541 輛疏散車輛數為：Q2Q1=19503880 = 1930 輛/h則排隊消散時間： 阻塞時間：t= t+1.69 = 0.28 + 1.69 = 1.97 h習題5-1解：已知：，大型車占總交通量的30%， ，平原地形。查表5-3， 取設計速度為100km/h，二級服務水平，一條車道的設計通行能力：車道數： 故該高速公路修成6車道。習題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）計算 核查交織區(qū)段諸限制值： ， ， 確定服務水平：查表5-10， 屬于二級， 屬于二級。第二段：計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）計算 核查交織區(qū)段諸限制值： ， ， 確定服務水平：查表5-10， 屬于三級， 屬于三級。習題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，交叉口各進口道的車行道區(qū)分為專用左轉和直右兩種。 西 東 計算直行車道的設計通行能力，用公式（5-23）。取t0=2.3s，=0.9。綠燈時間tg=(60-23)/3=18s。 據車種比例28，查表5-32，得ti=2.65s。將已知參數代入公式（5-23），則 南 計算直右車道的設計通行能力，用公式（5-24）： 各進口屬于設有專用左轉車道而未設右轉專用車道類型，其設計通行能力用公式（5-30）計算： 該進口專用左轉車道的設計通行能力，用公式（5-31）計算： 驗算是否需要折減 因T = 60s，所以n = 3600/60 = 60，不影響對面直行車輛行駛的左轉交通量： 本題進口設計左轉交通量，不折減。 交叉口的設計通行能力交叉口的設計通行能力等于四個進口設計通行能力之和。因本題四個進口相同，故該交叉口的設計通行能力為：對于圖2，南北進口的設計通行能力計算如下： 北 計算直右車道的設計通行能力，用公式（5-24）： 計算直左車道的設計通行能力，用公式（5-25）： 西 東 驗算北進口左轉車是否影響南進口車的直行 南，不折減。 交叉口的設計通行能力交叉口的設計通行能力等于四個進口設計通行能力之和。因本題東西進口相同，南北進口相同，故該交叉口的設計通行能力為：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箱的兩側引出，然后匯成一根母管，到汽輪機前再分成兩根支管分別接入高壓缸和中壓缸左右側主汽關斷閥和再熱關斷閥。Now, we are in a new historical stage of all-round construction of a well-off society. 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