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Page 10 of 14Majalah Ilmiah UNIKOM
Vol.8, No. 2
212
H a l a m a n
Muhammad Aria
location of them: the north input-links, the
west input links, the east input links and the
south input links. We give the traffic
generation plan to each input-link group, so
all input-links in a group have the same
plan. Cars are generated according to the
given plan of a input link and inserted into
the link. In the development of the traffic
simulator, the following assumptions are
made :
i. the intersection is four way junction with
traffic coming from the north, west, east
and south directions
ii. when traffic from the north and south
moves, traffic from the west and east
stops, and viceversa
iii. only passenger cars exist and there is no
obstruction to traffic flow such as cross-
walks.
iv. left turning traffic and right turning traffic
are 20% of the traffic of a link respec-
tively
In this simulation we use the following head-
way equation:
SIMULATION RESULTS AND DISCUSSION
Performance of Type 2 Fuzzy Logic System
(T2FL) is investigated using simulation stud-
ies. The developed controller was compared
with Type-1 Fuzzy Logic System (T1FL) and
Fixed Time Controller. Simulation was per-
formed under 18 situations.
1. Case that the traffics of all input links
are same :
(a) 900 cars/h
(b) 1100 cars/h
(c) 1300 cars/h
(d) 1500 cars/h
(e) 1700 cars/h
(f) 1800 cars/h
2. Case that the traffic changes every 15
minutes
a. case of light traffic (cars/h)
b. case of normal traffic (cars/h)
RULE
INPUTS
OUTPUTS
EXTEND
URGENCY
DECISION
1
Z
Z
No
2
Z
S
Yes
3
Z
M
Yes
4
Z
L
Yes
5
Z
VL
Yes
6
S
Z
No
7
S
S
No
8
S
M
Yes
9
S
L
Yes
10
S
VL
Yes
11
M
Z
No
12
M
S
No
13
M
M
No
14
M
L
Yes
15
M
VL
Yes
16
L
Z
No
17
L
S
No
18
L
M
No
19
L
L
No
20
L
VL
Yes
21
VL
Z
No
22
VL
S
No
23
VL
M
No
Table 3. Fuzzy Rules of the Decision Module
(19)
Time
0 – 15
15 –
30
30 –
45
45 –
60
North
1000
1000
900
1000
West
1200
1100
1100
1000
East
800
1000
1000
1100
South
900
1000
1100
1200
Time
0 – 15
15 – 30
30 –
45
45 –
60
North
1300
1400
1300
1300
West
1400
1400
1500
1300
East
1400
1300
1400
1300
South
1400
1300
1400
1300