Abstract
Interchanges that are investigated in this research are roundabout interchange and pinavia interchange that are simulated in AIMSUN software using traffic data. The parameters that are considered for each interchange are traffic volume, pollutant emissions, fuel consumption, travel time, delay time ,construction cost, repair and maintenance cost, travel time cost , fuel consumption cost and safety , so that in technical evaluation traffic volume, pollutant emissions, fuel consumption, travel time, delay time are compared by using two independent sample t – test that are used for comparing of two group of data and It is assumed that the variances are equal . Then In economic evaluation construction cost, repair and maintenance cost, travel time cost , fuel consumption cost and safety are converted into cost by using axis produce way that based on this supposal that storage in exchange for an hour of travel time, increase an hour of production opportunities and construction cost, repair and maintenance cost calculated by executive plans and Related Regulations and finally each parameter is weighted by AHP and obtain the universal (total) cost. Finally due to the total cost of the resulting it can be seen that for twenty-year period pinavia interchange in compare with roundabout interchange has 49% more efficient.
Highlights
With the increase in population and Growing travel demand the transportation directors encountered with safe and efficient transport of human and goods due to budget and land acquisition limitations
The parameters that are investigated in this study and enter in equations as follows traffic volume,air pollutant rate, fuel consumption rate,travel time,cost of construction, maintenance and accidents cost. in the first step,after preparing traffic information from Tabriz traffic organization and selecting simulator software (AIMSUN), Pinavia interchange and roundabout intersection (Azerbaijan square, Tabriz, Iran) are modelled according to certain case
In the following and using outputs of AIMSUN software for mentioned parameters an equation based on traffic volume rate,air pollutant rate,fuel consumption rate,travel time,delay time,cost of construction,and accidents reduction cost that are playing determinant role to select optimized plan as interchanges and/or intersections in the last step, all of the parameters turn to Rial price by using of Production-oriented method and the interchange and intersection total cost is obtained by entering physical weight of each parameter that by using AHP and expert experience
Summary
With the increase in population and Growing travel demand the transportation directors encountered with safe and efficient transport of human and goods due to budget and land acquisition limitations. Falhorty (1990) performed research about intersections design in London; he found that the required traffic data for intersection design included peak hour transit volume, rotator movements, public transportation plan, history of accidents and parking places Afandizadeh and his colleges (2008) results that modification of intersection geometry design affected directly on accidents number and indirectly on speed, traffic volume and queue length but in recent years, converting level crossings to interchanges as a promising and undeniable solution considered to intersections effective management due to current substructures that use of this conversion provided potential sources such as safety increasing, travel time improvement, environmental pollutants reduction, saving capital long-time, reduced fuel consumption, and reduced accidents and fatalities [1]
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