FACULTY OF CIVIL AND ENVIRONMENTAL ENGINEERING DEPARTMENT OF TRANSPORTATION AND HIGHWAY ENGINEERING
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Ohio State Engineering Lab Report about measuring the speed of traffic flow to determine the safety of the given area.
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Accident is a term used to represent sudden fatal event with multiple reasons, persons, properties and things evolved. The main cause of accidents by many researches is concluded as speed factor and speed is the parameter which mainly depends upon th
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INTRODUCTION Speed is the rate of movement of a vehicle, generally expressed in kilometers per hour. A spot speed study is a study of traffic speed at one point or spot on a traffic way. It consists of a series or a sample of observations of the individual speeds at which vehicles are approaching an intersection or passing a point at a non-intersection location. These observations are used to estimate the speed distribution of the entire traffic stream at that location, under the conditions prevailing at the time of the study. Spot speed studies can be used to study speeds at problem locations in order to determine whether speeds are too high and if complaints received are justified, for accident analysis in order to determine the relationship of speed to accidents which may help in developing corrective measures, and for before-and-after studies in order to evaluate the effect of some change in controls or conditions. In relation with this study, there have been several complaints of vehicles speeding along the UTHM-Fujitsu section of road. This poses a danger to motorists, pedestrians and cyclists as there is a lot of activity in the area. Furthermore, there are plenty of right-turning movements along this stretch of road, with no storage lanes provided for right-turners. This is dangerous because the right-turners stop on the fast lane and have no protection. OBJECTIVE The objectives of this study are: 1. To determine the speed characteristics of traffic at the location. 2. To justify the problem of speeding at the location. APPARATUS 1. Radar Gun 2. Forms SS1 and SS2 3. Graph Paper (3 nos) 4. Safety Vest PROCEDURE 1. The spot at which the speed data will be collected are being identified. 2. The radar gun that being used are needed to measured the speed of vehicles according to their respective vehicle class – Class 1 (Motorcycles), Class 2 (Cars), Class 3 (Vans & Medium Trucks), and Class 4 (Large Trucks & Buses). Make sure that the operator of the radar gun is not seen by the motorists 3. All speed measurements are recorded in Form SS1. 4. Based on Form SS1, the mean, maximum and minimum speed of vehicles is being determined according to their class. All the findings are being commented. 5. The data in Form SS1 are being transferred to Form SS2. 6. The following data are being plotted: (a) Frequency Histogram (Percentage of vehicles vs. Speed)
(b) Frequency Distribution Curve (Percentage of vehicles vs. Speed) (c) Cumulative Frequency Distribution Curve (Cumulative percentage vs. Speed) 7. The following speed characteristics are being determined: (a) Mean speed (b) Median speed (c) Mode speed (d) 85-th Percentile speed (e) Standard deviation (f) Pace 8. All the findings are being stimulated.
DATA ANALYSIS AND RESULT Form SS1 Location: In front Factory Fujitzu Date : 16-2-2009 Time 2.35pm - 3.35pm Weather: Sunshine Spot Speed (km/h) Time Vehicle Class 1 2 3 56 62 65 66 55 44 70 64 52 53 68 36 45 76 70 63 58 75 74 64 75 57 50 63 55 63 72 48 53 53 54 62 66 57 69 56 62 42 46 2.35pm until 46 46 75 2.45pm 64 72 66 72 65 75 48 77 88 66