Question

1. The output of 2-zones traffic study shown in the table below. It is required to evaluate the LOS for each link based on traffic volume and speed characteristics. If the LOS is not accepted, suggest how you can improve it. Road A: V=550 Veh./hr Capacity Free travel time increase (Veh/hr) speed (km/hr) factor (a) Road A 700 120 0.4 Road B:V=300 veh./hr Road B 600 0.6 120

Answer 1

As it is a free way segment we use the first table.

per lane CLASSIFICATION OF LEVEL OF SERVICE... LOS FOR A BASIC FREEWAY SEGMENT LOS FOR AN INTERSECTION LOS Vehicles per km Velocity w/s LOS Control Delay Delay (veh/km/lane) (Km/hr) sec/veh sec/veh (unsignalised) (signalised) 0-7 120 0.35 S 10 7-11 120 0.55 10-20 10-15 11-16 0.77 20-35 15-25 16-22 99 0.92 D 35-55 25-35 510 114 22-28 85 1.0 55-80 35-50 F > 28 <85 > 1.0 > 80 > 50

L ORES SENESTER NUS bunte SINH I ROADA Given (= 700 Geliny). V = 550 verine speed/= 120 (km/h) velocity a = 0.4 ,B=1 CB = 700 (1+014)' 3) Clitd) = 980 veh/km Ilame = 550 verlof O no km loto = 4.58 venlam I love = o-7 ... VI. allowable =0:35 (from table) (ca Here, V/CR = 550 =0.561 >0:35 | Los is not 1 980 I accepted Given c = 600/ver/hr) U,300 velho velocity = 120 (km/h) 2=0 6 B=1. CB = 600 (406)' = c(Ha) * - 960 veh/km / lame = 300 veh/hr - 120 km/hr =2.5 ven Ikan I one =) 07 (table) VI allowable =035 (from table). Here, vo = 300 = 0.3125 2035 T. Los is accepted ROAD B: DENTITY 960 TE