Abstract
This study was conducted to use acceleration noise as an alternative measure to the level of service on multi-lane urban highways located within Kirkuk City. The study provides a simplified and easy way to evaluate the level of service (LOS) instead of the extended methodology proposed by the Highway Capacity Manual (HCM-2010). Ten (10) multi-lane urban segments were chosen within the study area for collecting the required field data. Moving Vehicle Method (MVM) with a digital camera equipped with a built-in GPS receiver were utilized to collect field data. Acceleration noise takes the form of an exponential function (y = ex) when associated with traffic flow variables (traffic volume, density, and speed). Final results have revealed that acceleration noise could be used as a surrogate measuring the level of service for multi-lane urban highways within the ranges of the level of service LOS A-LOS C.
Highlights
Acceleration Noise can be defined as the second derivative of the speed or standard deviation of the vehicle-acceleration, including the acceleration and/or deceleration [1]
It is considered as a factor to measure the quality and smoothness of traffic flow for two significant reasons [3]
Ten (10) segments of six-lane divided urban roads located in the city center of Kirkuk selected for data collection of this research, and Table (1) is showing the North-East Latitude and departures of the sample segments included in this study
Summary
Acceleration Noise can be defined as the second derivative of the speed or standard deviation of the vehicle-acceleration, including the acceleration and/or deceleration [1]. It represents the mathematical sum of two components of noise experienced by drivers, namely [2]; 1. Natural-Noise: represents the change in the acceleration either as an increase or decrease of the vehicle speed as a result of the impact of road's geometric characteristics such as the presence of traffic hump, surface friction, narrow lateral clearance, and bridges or subways...., etc.; and; 2. Acceleration noise was first proposed and discussed as a parameter that describing the characteristics of road-traffic-drivers/vehicles under different conditions [1].
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