1. Traffic volume study during peak hours.
0202395
Phase 1:GaR
025656895
Phase 2:RGaR
07090 9395
Phase 3:RGaR
DATA ANALYSISTABLE 1
Approach (Movement): SRI GADING (RIGHT-TURN) Lane: 1Day/Date: 28/04/2015 Time: 1315-1415 Weather: ____________TimeTraffic Count
Vehicle Class
1234
1315 -1330105042
1331-1345103672
1346-1400124971
1401-141595944
Vehicle ClassTraffic Volume(veh/hour)p.c.u.Factorp.c.u.
Class 1 (Motorcycles)410.3313.53
Class 2 (Cars)1941.00194.00
Class 3 (Vans & Medium Trucks)221.7538.50
Class 4 (Heavy Trucks & Buses)92.2520.25
Total ()266.28
Note: p.c.u. = passenger car unit
TABLE 2
Approach (Movement): SRI GADING (THROUGH) Lane: 2Day/Date: 28/04/2015 Time: 1315-1415 Weather: ____________TimeTraffic Count
Vehicle Class
1234
1315 -133091652317
1331-134571762412
1346-140010183238
1401-141591792915
Vehicle ClassTraffic Volume(veh/hour)p.c.u.Factorp.c.u.
Class 1 (Motorcycles)350.3311.55
Class 2 (Cars)7011.00701.00
Class 3 (Vans & Medium Trucks)991.75173.25
Class 4 (Heavy Trucks & Buses)522.25117.00
Total ()1002.80
Note: p.c.u. = passenger car unit
TABLE 3
Approach (Movement): SRI GADING (THROUGH) Lane: 3Day/Date: 28/04/2015 Time: 1315-1415 Weather: ____________TimeTraffic Count
Vehicle Class
1234
1315 -1330425353
1331-13453875114
1346-1400365397
1401-14152768118
Vehicle ClassTraffic Volume(veh/hour)p.c.u.Factorp.c.u.
Class 1 (Motorcycles)1430.3347.19
Class 2 (Cars)2491.00249.00
Class 3 (Vans & Medium Trucks)361.7563.00
Class 4 (Heavy Trucks & Buses)222.2549.50
Total ()408.69
Note: p.c.u. = passenger car unit
TABLE 4
Approach (Movement): BATU PAHAT (THROUGH) Lane: 1Day/Date: 28/04/2015 Time: 1315-1415 Weather: ____________TimeTraffic Count
Vehicle Class
1234
1315 -1330711493
1331-13459102114
1346-140012112161
1401-1415414362
Vehicle ClassTraffic Volume(veh/hour)p.c.u.Factorp.c.u.
Class 1 (Motorcycles)320.3310.55
Class 2 (Cars)4711.00471.00
Class 3 (Vans & Medium Trucks)421.7573.50
Class 4 (Heavy Trucks & Buses)102.2522.50
Total ()577.55
Note: p.c.u. = passenger car unit
TABLE 5
Approach (Movement): BATU PAHAT (THROUGH) Lane: 2Day/Date: 28/04/2015 Time: 1315-1415 Weather: ____________TimeTraffic Count
Vehicle Class
1234
1315 -1330101151214
1331-134513112183
1346-140012115227
1401-141551112015
Vehicle ClassTraffic Volume(veh/hour)p.c.u.Factorp.c.u.
Class 1 (Motorcycles)400.3313.20
Class 2 (Cars)4531.00453.00
Class 3 (Vans & Medium Trucks)671.75117.25
Class 4 (Heavy Trucks & Buses)392.2587.75
Total ()671.20
Note: p.c.u. = passenger car unit
TABLE 6
Approach (Movement): BATU PAHAT (THROUGH) Lane: 3Day/Date: 28/04/2015 Time: 1315-1415 Weather: ____________TimeTraffic Count
Vehicle Class
1234
1315 -13304852812
1331-134528621313
1346-1400375089
1401-141536491816
Vehicle ClassTraffic Volume(veh/hour)p.c.u.Factorp.c.u.
Class 1 (Motorcycles)1490.3349.17
Class 2 (Cars)2131.00213.00
Class 3 (Vans & Medium Trucks)471.7582.25
Class 4 (Heavy Trucks & Buses)502.25112.50
Total ()456.92
Note: p.c.u. = passenger car unit
TABLE 7
Approach (Movement): BATU PAHAT (LEFT -TURN) Lane: 4Day/Date: 28/04/2015 Time: 1315-1415 Weather: ____________TimeTraffic Count
Vehicle Class
1234
1315 -133010431-
1331-13458548-
1346-140094521
1401-141585181
Vehicle ClassTraffic Volume(veh/hour)p.c.u.Factorp.c.u.
Class 1 (Motorcycles)350.3311.55
Class 2 (Cars)1931.00193.00
Class 3 (Vans & Medium Trucks)191.7533.25
Class 4 (Heavy Trucks & Buses)22.256.75
Total ()244.55
Note: p.c.u. = passenger car unit
TABLE 8
Approach (Movement): BP MALL (RIGHT/LEFT-TURN) Lane: 1Day/Date: 28/04/2015 Time: 1315-1415 Weather: ____________TimeTraffic Count
Vehicle Class
1234
1315 -1330123151
1331-134593761
1346-1400134751
1401-141511615-
Vehicle ClassTraffic Volume(veh/hour)p.c.u.Factorp.c.u.
Class 1 (Motorcycles)450.3314.85
Class 2 (Cars)1761.00176.00
Class 3 (Vans & Medium Trucks)211.7536.75
Class 4 (Heavy Trucks & Buses)32.256.75
Total ()234.35
Note: p.c.u. = passenger car unit
TABLE 9
Approach (Movement): BP MALL (LEFT -TURN) Lane: 2Day/Date: 28/04/2015 Time: 1315-1415 Weather: ____________TimeTraffic Count
Vehicle Class
1234
1315 -133092352
1331-13457275-
1346-1400328--
1401-1415834-1
Vehicle ClassTraffic Volume(veh/hour)p.c.u.Factorp.c.u.
Class 1 (Motorcycles)270.338.91
Class 2 (Cars)1121.00112.00
Class 3 (Vans & Medium Trucks)101.7517.50
Class 4 (Heavy Trucks & Buses)32.256.75
Total ()145.16
Note: p.c.u. = passenger car unit
2. Determine the capacity and level of service
Phase 1Period cycle time, C=95 sGreen time, g=65 sAmber time, a=3 s
Phase 2Period cycle time, C=95 sGreen time, g=20 sAmber time, a=3 s
Phase 3Period cycle time, C=95 sGreen time, g=20 sAmber time, a=3 s
PhaseIIIIII
Movement
C (sec)959595959595959595
g (sec)656565656520202020
= g/C0.680.680.680.680.680.210.210.210.21
S (pcu/hr)188518851885188518851435.24188518851359.34
q (pcu/hr)1002.80408.69577.55671.20456.92266.281002.80408.69234.35
qs(pcu/sec)0.2790.1140.1600.1860.1290.0740.2790.1140.065
x = q/S0.780.320.450.520.360.882.531.030.82
d (sec)1.493.933.453.123.811.18-8.13-0.351.76
LOSAAAAAAAAA
3. Propose improvements to the design of the intersection and the traffic signal
Table 10PhaseIIIIII
Movement
W (m)3.503.503.503.503.503.503.503.505.25
S (pcu/hr188518851885188518851435.24188518851359.34
q (pcu/hr)1002.80408.69577.55671.20456.92266.281002.80408.69234.35
y = q/S0.530.220.310.360.240.190.530.220.17
y0.530.530.17
Key:S = Sri Gading Approach; B = Batu Pahat Approach; M = BP MALL Approach T = Through; R = Right-turn; L= Left-turn 1 = Lane 1; 2 = Lane 2; 3 = Lane 3; 4 = Lane 4
Since so, geometrics of the intersection need to upgrade to increase capacity.
Geometrics need to upgrade with simple junction with one lane not interrupt flow. This geometrics upgrade already use in Malaysia example at junction Jalan Daya, Johor Bahru show in map 1 and picture 1,
Map 1 : location Jalan daya, Johor Bahru
Picture 1: Junction at Jalan Daya, Johor bahru
Layout below shows new geometrics at BP Mall junction.
Table 11PhaseIIIIIII
Movement
W (m)3.503.503.503.503.503.505.25
S (pcu/hr18851885188518851435.2418851359.34
q (pcu/hr)408.69577.55671.20456.92266.28408.69234.35
y = q/S0.220.310.360.240.190.220.17
y0.360.220.17
Key:S = Sri Gading Approach; B = Batu Pahat Approach; M = BP MALL Approach T = Through; R = Right-turn; L= Left-turn 1 = Lane 1; 2 = Lane 2; 3 = Lane 3; 4 = Lane 4
Amber time, a=3 secAll- red period, R=2 secIntergreen time, I=a+R=3+2=5 secDriver reaction time, =2 secNumber of phases, n = 3Total lost time, L = n(I a) + nl = 3(5-3)+(3)(2)=12 secPractical capacity, Yprac = 0.9 0.0075L = 0.9 0.0075(12) = 0.81Reserve capacity, RC = 100% x ( Yprac Y ) / Y = 100(0.81-0.75)/0.75=8 sec
Determination of Optimum Cycle Time, Optimum cycle time, Design we can between 45 s to 120 s, although an absolute minimum of 25 s can be used.For simplicity, take design
Determination of Signal SettingTotal effective green time = = Effective green time,
+ + = 40 + 24 + 19 = 83 s ok
Actual green time, G=g + + R
Controller setting time, K= G a R
The timing schedule is shown below 0394295
Phase 1:GaR
044677095
Phase 2:RGaR
07290 9395
Phase 3:RGaR