May 7, 2018 | Author: Emman Pile | Category: Traffic, Highway, Land Transport, Road Transport, Transportation Engineering
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1. Briefy Briefy describe describe the two two types o visual visual acuity acuity..  The two types o visual acuity acuity is dynamic and and static. Dynamic Dynamic is the ability ability o the driver to see objects in motion. On the other hand, Static is the ability o the driver to see stationary object iven that the driver is stayin on a speci!c location. ". Di#erentia Di#erentiate te amon the three three types o vehicle vehicle characteris characteristics tics..  There are are three types o vehicle characteristics characteristics.. Static, $inematic and Dynamic. Static is the characteristic characteristic that describes the weiht and dimensions o the vehicle. $inematic describes the motion o vehicle without considerin the orces that brins it in motion. %astly is Dynamic, it describes the orces that causes the vehicle in motion. &. 'hat are are the advantaes and disadvantaes disadvantaes o machine machine vision (video imae imae detection) when compared with other orms o detection*  The advantaes o usin these these type o devices devices is we can now easily ather ather data plus it can reduce human error. The disadvantaes is that it is e+pensive and not recommendable recommendable or sinle use. n addition to disadvantaes, disadvantaes, it is machine which is prorammed to a speci!c job. t can-t handle technicalities lie human can. /. Select and describe the method and e0uipment e0uipment you you will recommend or trac volume counts or each o the road sections iven below. 2ive reasons or your recommendations. recommendations. a) 3 private private road leadin leadin  to an industri industrial al developmen developmentt  recommend the use o nductive Burial %oop 4ehicle 5ounter. This device is buried under the roads and counts vehicles that pass throuh it. t is recommended in this types o location because or sure the vehicles will o to this area will increase over time because it is an industrial development development area and you will need to conduct a number o surveys to this area. b) 3 resi residen dentia tiall stre street et  The volume o vehicles vehicles in this location is not not much as hihways, hihways,  recommend recommend to use stic method to count the vehicles. t will be cheaper compared with the use o electronic devices. c) 3 rur rural al collec collector tor road road  recommend the use o 6neumatic 7oad Tubes. This device counts the vehicle every time a vehicle pass throuh the hose.  recommend this because a sinle survey can be enouh or this area because oriin o vehicles is just in a speci!c locations which  can say the number o vehicles can be constant or a lon period o time. d) 3 section section o a reeway reeway hihw hihway, ay, say say 8%9:

 recommend the use o 3utoscope,  recommend the use o this advance device in hihway lie 8%9: because it can handle hue volume o vehicles. ;nlie other devices it doesn-t depends on interaction o vehicles with the devices. t uses video imae detection which is suitable or ree hihways or the drivers not to be disturbed durin their travel. miles o travel (4?T)  This survey is used or measurement o miles traveled by vehicles within a speci!ed reion or a speci!ed time period. The data athered can be used in spot speed o vehicles and helps to set a speed limit or a speci!c reion o hihway. d) 6ea hour volume ([email protected])  This survey counts the capacity o hihway iven a consecutive A= minutes which is normally done by atherin data every our consecutive 1< minutes and ettin its averae. t use or developin trac routin and parin reulations. t can also be used in plannin the eometric characteristic o hihway. A. Describe the di#erent trac>count prorams carried out in the country or in your locality. 'hat data are collected in each proram, i there is any* 67O59D;79S 7O3D S;749S done by ??D3 alon 9DS3. The researchers crossed overpasses and e+amined the e#ects o ellow %anes, ;>turns and speed o the fow o vehicles. %iewise investiations o the most re0uently encountered problems were observed. C.

Describe the ollowin types o trac volume counts and e+plain when they are used (a) screen>line counts, (b) cordon counts, (c) intersection counts, and (d) control counts.

a.The study area is divided to di#erent lare sections by puttin imainary lines. To mae the study easier, manmade barriers lie rivers, railway, tracs or any easily reconiEed locations are used as screen lines. t is used to determine the trac volume in the area and to determine trac fow direction due to chanes in land> use pattern o the area.

b.5ordon counts is done by puttin an imainary loop into a speci!c area (oten central business district o a city) particular in a speci!c time. That imainary loop will serves as countin lines. By the use o this method, you can determine the rate o vehicle oin inside and outside o the area. This count method is used or plannin parin acilities, updatin trac operational techni0ues and main lon rane plans or reeway and arterial street systems. c.ntersection counts is used to determine classi!cations o vehicles passin the area and the turnin movements in the intersections. The study is used or determinin phase lenths and cycle lenths or sinaliEed intersections or by improvin the intersection. d.5ontrol counts is done seasonally or monthly in the previous location o volume counts. The purpose o this to count the e+pansion or infation o vehicles to determine year round averae values rom short counts. F. @ow are travel time and delay studies used* Describe one method or collectin travel time and delay data at a section o a hihway.  The study is used to determine travel time and the causes o delay in transportation in a speci!c lenth o hihway. One method to determine travel time is 3verae speed techni0ue. t is done by drivin the test car alon the speci!c lenth o hihway at a speed that the drivers thin is averae then the test is repeated into a minimum number o times to et the averae travel time. G. 9+plain how to obtain the ollowin inormation rom the data collected (a) travel time, (b) operational delay, (c) stopped time delay, (d) !+ed delay, and (e) travel time delay. a.Travel time can be obtained by the use o timer or in an unconested road by dividin distance o hihway over speed. b.Operational delay is obtained by recordin the delay caused by the impedance o other trac. 9+ample o these parin or unparin o vehicles causin blocin in the path o way. c.Stopped time delay is obtained by recordin the delay durin the vehicle is at rest. d.Hi+ed delay is obtained by recordin the delay caused by control devices such as trac sinals. e.Travel time delay is obtained by ettin the di#erence o actual travel time and the delayed travel time. 1=.Discuss parin studies its uses, important terms, methods, and important data or the conduct o one. mportant terms

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