Spot Speed Study

UNIVERSITI TUN HUSSEIN ONN MALAYSIA (UTHM) 1.0

INTRODUC INTR ODUCTION TION

Speed is the rate of movement of a vehicle, generally expressed in kilometres per hour. A spot speed study of traffic speed at one point or spot on a traffic way. It consists of a series or a sample of observation of the individual speed at which vehicles are approaching an intersection intersection or passing a point point at anon-intersect anon-intersection ion location. These observations observations are used to estim estimate ate the the spee speed d distr distrib ibut utio ion n of the the enti entire re traf traffi ficc stream stream at that that loca locatio tion, n, unde underr 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 ustified, 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, there has been several complaints of vehicles speeding along the !T"# $ %uitsu section of road. This poses a danger to motorists, pedestrians and cyclists as there there is a lot lot of activ activit itie iess in the the area. area. %urt %urthe herm rmor ore, e, there there is aplen aplenty ty of right right-t -tur urni ning ng 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.

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OBJEC OBJ ECTI TIVE VE

The obectives of this study are &'. To determine determine the speed characteri characteristics stics of traffi trafficc at the locatio location. n. (. To ustify the problem problem of speeding speeding at the the location. location. 3.0 3. 0

APPARATU AP PARATUS S '. Stopwatch (. %orm %ormss SS' SS' and and SS( SS( ). Safe Safety ty *est

1|CENTER FOR DIPLOMA STUDIES (CEDS)

UNIVERSITI TUN HUSSEIN ONN MALAYSIA (UTHM)

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PROCEUDRE Identify the location +et vehicles speeds on the road using stop watch and record the data. ecord all speed measurements in %orm SS'. ount and classify the vehicles according to class using the analog counter. lass ' /#otocycle0 • lass ( /ars0 • lass ) /*an and Small 1orries0 • lass  /2ig 1orries 3 2uses0 • ecord the numbers of vehicle and vehicle speeds according to their respective class. Transfer the data in %orm SS' to %orm SS(. !sing the data, draw the &a0 %re7uency "istogram /8ercentage of vehicles vs. Speed0  b0 %re7uency 9istribution urve /8ercentage of vehicles vs. Speed0 c0 umulative %re7uency 9istribution urve /umulative percentage vs. Speed0 6. 9etermine the following speed characteristics& a0 #ean speed, #edian speed and #ode speed  b0 :4-th 8ercentile speed c0 Standard deviation d0 8ace %rom the result, suggest a reasonable average speed /example Speed 1imit and Speed