Appendix 11.3 Road Population Estimation and Site Survey Data
1. Traffic data of roads near SCISTW were obtained from the Annual Traffic Census 2005 of Transport Department to estimate the road population. For Lai Po Road, Ngong Shung Road, Mei Ching Road and Hing Wah Street West, traffic data was not available from the Traffic Census. Therefore, traffic population of these roads was estimated based on data obtained from site survey conducted by the Consultants during the peak hour (8am to 9am). Raw data of the site traffic survey is presented in Table 2.
2. Speed limit is 100km/hr on West Kowloon Highway and 50km/hr on other roads. The road population was estimated based on the following equation:
Traffic Population
= “No. of person per vehicle” x “No. of vehicles per hr” x “Road Length that could be affected by the ADF hazardous events” / “Speed of vehicles”
3. Number of people per vehicle was estimated with reference to the Annual Traffic Census. Traffic breakdown (average number of people per vehicle) of the main roads was used to project the traffic breakdown of the roads nearby. According to the Annual Traffic Census 2005, the “Vehicle classification and occupancy” data (enclosed at the end of this Appendix) of the Container Port Road South, Lin Cheung Road and West Kowloon Highway was adopted to estimate the number of people per vehicle. The estimated figure for Container Port Road South was adopted for nearby Ngong Shung Road, Hing Wah Street West, Lai Po Road and Mei Ching Road; figure for Lin Cheung Road is also adopted for the nearby Sham Mong Road. The number of people per vehicle was calculated by the equation:
|
|
|
n |
|
No. of ppl per vehicle |
= |
å Proi * Ocpi |
|
|
|
1 |
Where Proi is the proportion of vehicle type i in %
Ocpi is the average occupancy of vehicle type i
4. Number of vehicle per hour was calculated with reference to the Annual Traffic Census 2005,”. It was calculated by dividing the Annual Average Daily Traffic (AADT) by 24 hours.
5. A section of KCRC West Rail is located within the assessment area. The daily passenger flow within the assessment area was estimated based on the KCRC Annual Report 2005 and calculated by the equation below:
Railway Population
= “no. of people travelled along West Rail per hr” a x “railway alignment length that could be affected by ADF hazardous events” / “speed of train” b
Note:
a. No. of people travelled along West Rail per hr = (Average Daily Ridership of West Rail) x (Day: Night ratio/12 hrs), where Day: Night ratio was assumed to be 70%
b. Speed of train was assumed to be 50km/hr
The estimated road and railway population is presented in Table 1 below.
Table 1 Road and Railway Population within the Assessment Area
|
AADT |
Length (m) |
No. of ppl / vehicle |
Population during Daytime |
Remarks |
|
|
Container Port Road South |
36960 |
1481 |
1.6 |
73.0 |
Data obtained from Annual Traffic Census Station Number S6214 |
|
Hing Wah Street West |
4896 |
1509 |
1.6 |
9.9 |
a)
AADT was calculated based on the vehicles counted in the Traffic Survey
(average number of vehicle during peak hour x 24) |
|
Lai Po Road |
9504 |
2963 |
1.6 |
37.5 |
a)
AADT was calculated based on the vehicles counted in the Traffic Survey |
|
Ngong Shung Road |
2196 |
1111 |
1.6 |
3.3 |
a)
AADT was calculated based on the vehicles counted in the Traffic Survey |
|
Lin Cheung Road |
10500 |
1481 |
2.5 |
32.4 |
Data obtained from Annual Traffic Census Station Number S3025 |
|
West Kowloon Highway |
75880 |
1528 |
4.1 |
198.1 |
Data obtained from Annual Traffic Census Station Number S3024 |
|
Mei Ching Road |
21060 |
556 |
1.6 |
15.6 |
a)
AADT was calculated based on the vehicles counted in the Traffic Survey 1 |
|
Sham Mong Road |
10460 |
463 |
2.5 |
10.1 |
a)
AADT obtained from Annual Traffic Census Station Number S3296 |
|
KCRC West Rail |
407 |
1509 |
- |
78.9 |
According to KCRC Annual Report 2005, Daily Average Ridership and Daily number of train trips of West Rail is 179200 and 407 respectively. It was conservatively assumed that ridership between Nam Cheong Station and Mei Foo Station was 1/4 of the total ridership. |
Table 2 Raw Data of Traffic Survey
Traffic Survey for Mei Ching Road
ROAD NAME: |
Mei Ching Road |
||
|
LOCATION: |
Interchange of Mei Ching Road and Container Port Road South |
||
|
TIME/DATE: |
From 8:00am to 9:00am / 23 Feb 2007 |
||
|
NO OF LANES: |
6 |
||
|
|
|
|
|
|
TIME (mins) |
NUMBER OF VEHICLES PASSING |
||
|
From West Kowloon Highway to Container Rd |
From Container Rd to West Kowloon Highway |
TOTAL |
|
|
10 (8:00 – 8:10) |
87 |
56 |
143 |
|
10 (8:15 – 8:25) |
78 |
70 |
148 |
|
10 (8:30 – 8:40) |
88 |
72 |
160 |
|
10 (8:45 – 8:55) |
76 |
58 |
134 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Traffic Survey for Ngong Shung Road |
|
|
|
|
ROAD NAME: |
Ngong Shung Road |
||
|
LOCATION: |
End of Ngong Shung Road (near to Container Port Road South) |
||
|
TIME/DATE: |
From 8:00am to 9:00am / 23 Feb 2007 |
||
|
NO OF LANES: |
2 |
||
|
|
|
|
|
|
TIME (mins) |
NUMBER OF VEHICLES PASSING |
||
|
Out |
In |
TOTAL |
|
|
10 (8:00 – 8:10) |
5 |
8 |
13 |
|
10 (8:15 – 8:25) |
7 |
9 |
16 |
|
10 (8:30 – 8:40) |
5 |
11 |
16 |
|
10 (8:45 – 8:55) |
6 |
10 |
16 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Traffic Survey for Lai Po Road
|
ROAD NAME: |
Lai Po Road |
||
|
LOCATION: |
Interchange of Lai Po Road and Hing Wah Street West |
||
|
TIME/DATE: |
From 8:00am to 9:00am / 23 Feb 2007 |
||
|
NO OF LANES: |
2 |
||
|
|
|
|
|
|
TIME (mins) |
NUMBER OF VEHICLES PASSING |
||
|
To Hing Wah St W |
From Hing Wah St W |
TOTAL |
|
|
10 (8:00 – 8:10) |
37 |
31 |
68 |
|
10 (8:15 – 8:25) |
31 |
34 |
65 |
|
10 (8:30 – 8:40) |
28 |
39 |
67 |
|
10 (8:45 – 8:55) |
20 |
44 |
64 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Traffic Survey for Hing Wah Street West |
|
|
|
|
ROAD NAME: |
Hing Wah Street West |
||
|
LOCATION: |
Interchange of Lai Po Road and Hing Wah Street West |
||
|
TIME/DATE: |
From 8:00am to 9:00am / 23 Feb 2007 |
||
|
NO OF LANES: |
2 |
||
|
|
|
|
|
|
TIME (mins) |
NUMBER OF VEHICLES PASSING |
||
|
To Lai Po Rd |
From Lai Po Rd |
TOTAL |
|
|
10 (8:00 – 8:10) |
11 |
34 |
45 |
|
10 (8:15 – 8:25) |
10 |
15 |
25 |
|
10 (8:30 – 8:40) |
15 |
28 |
43 |
|
10 (8:45 – 8:55) |
9 |
14 |
23 |
|
|
|
|
|