Safety Analysis Of Interchange

Interchange designers often with sexual norms do better, to the norms or standards not involved in the design they turn a blind eye or to use their experience, at fault is often hidden causes of accidents, causing unnecessary losses.In light of practice, relying solely on the"Guidelines for Safety Audit of Highway"and relevant norms for interchange safety analysis is not enough, need operation from the traffic flow, traffic, traffic engineering and so on in-depth analysis, in order to form a more comprehensive interchange safety evaluation system, this paper uses three examples to illustrate.The first example is the raochengdong hub interchange of hang-pu highway safety analysis .based on the existing domestic norms and standards at home and abroad related mature theories, methods and documentation, First accordance with the "Guidelines for Safety Audit of Highway" road compliance checks, reuse the United States "Highway Capacity Manual" HCM2000 matching procedures relevant sections of the operating speed and level of service calculation. From the analysis of the calculation results, 1. Xiasha interchange between raochengdong hub interchange basic freeway segment of the lower level of service, Show in 2010 , in 2020 for F level.2. raochengdong hub interchange and haining interchange between weaving vehicle and Nonweaving vehicle operation in two weaving section there exists difference in speed .According to The results of the analysis, puts forward the following proposal:1. Xiasha Interchange between raochengdong hub interchange basic freeway segment expand treatment.2. Haining Interchange between raochengdong hub interchange weaving section intertwined area drainage treatment.3. The regional security facilities and signs marking set up to manpower design.The second example is the accident-prone interchange analysis and ectification. The main analysis is on the Haining Interchange and on the Jiaxing hub Interchange between weaving section, safety evaluation indicators for the operating speed, level of service, operational analysis , Calculation method and the first one example of the same, in accordance with the current program (A program) and set a rectification plan ( B program) analysis.Analysis of results: the weaving confignration of A program is type C, Region-wide service level is E, Speed uneven, the accident probability is high, B program is type A, I regional service levels is grade A, The regional distribution is uniform, The accident probability is general, Jiaxing City Department of Transportation under section B of the program do for improvement, greatly reduce the accident rate, Driving is a reflection of good staff.The third example is Linhai-chengxi interchange ramp- cross-plane safety analysis. In accordance with the "Guidelines for Safety Audit of Highway" requirement, junction on the location, form, coordination of operational speed, turning radius and turning speed, line-of-sight, facilities, and other aspects of traffic safety analysis and evaluation, Final results were under evaluation in accordance with the recent, long-term measures to improve, Increased ramp- cross-Plane Safety.Based on the above three examples of the safety analysis, paper presents the following conclusions:1. Interchange design should attach importance to safety.2. Ultra-small spacing Interchange is not the norms can not be done.3. Interchange safety analysis method has the diversity and practicality.4. Recommendations in the "Guidelines for Safety Audit of Highway" interchange intertwined increase in the weaving section operation of the content evaluation.