❓ A WA parliamentary question seeks data and predictions regarding traffic volume on the Narrows Bridge, including vehicle counts, future projections, and the number of Transperth buses, prompting a detailed response from the responsible Minister.
AnsweredQoN 2361Legislative Council
QuestionView source ↗
In view of the construction of the southern suburbs railway -
(1) How many vehicles are going over the Narrows Bridge, per day, as a July 1 2004?
(2) What is the prediction for the number of vehicles travelling over the Narrows Bridge, per day, as at -
(a) July 1 2010; and
(b) July 1 2020?
(3) How many of these vehicles will be Transperth buses?
(4) Has a report been done to justify these figures?
(5) If so, can the Minister please table this report?
(1) How many vehicles are going over the Narrows Bridge, per day, as a July 1 2004?
(2) What is the prediction for the number of vehicles travelling over the Narrows Bridge, per day, as at -
(a) July 1 2010; and
(b) July 1 2020?
(3) How many of these vehicles will be Transperth buses?
(4) Has a report been done to justify these figures?
(5) If so, can the Minister please table this report?
AnswerView source ↗
Answered
21 October 2004
Responded by
Parliamentary Secretary representing the Minister for Planning and Infrastructure
Response time
56 days
(b) July 1 2020?
1). The hourly distribution of flows as at 1 July 2004 across The Narrows Bridge (north bound and south bound) was as follows: Time 1-Jul-04 1-Jul-04 NB SB Combined 0-1 370 532 902 1-2 184 286 470 2-3 122 196 318 3-4 117 193 310 4-5 222 244 466 5-6 771 829 1600 6-7 2999 2494 5493 7-8 6479 4523 11002 8-9 7653 5522 13175 9-10 6108 4389 10497 10-11 4567 3893 8460 11-12 4297 4046 8343 12-13 4413 4529 8942 13-14 4264 4542 8806 14-15 4302 4910 9212 15-16 4623 6392 11015 16-17 5429 7741 13170 17-18 5803 7558 13361 18-19 4441 6675 11116 19-20 2945 3561 6506 20-21 1782 2489 4271 21-22 1641 2436 4077 22-23 1358 2005 3363 23-24 772 1232 2004 Total 75662 81217 156879 2) (a) Approximately 169 000 vehicles per average weekday. (b) Approximately 183 200 vehicles per average weekday. These predictions do not take account of the very significant potential impact on car usage resulting from higher oil prices and dwindling supplies that the world economy will certainly face in future years. Insofar as the Public Transport Authority is concerned: 3) Currently on a typical weekday, there are 595 Transperth bus trips travelling north over the Narrows Bridge and 596 Transperth bus trips travelling south. · On 1 July 2010, after a significant number of Transperth bus trips are replaced by the southern rail line, it is estimated that 270 bus trips will travel north over the Narrows Bridge and 270 bus trips will travel southward. · On 1 July 2020, it is difficult to accurately predict the number of Transperth bus trips at this time given the degree of change in travel behaviour and transport technology. However, as an estimate based on existing public transport growth patterns, in the order of 400 bus trips would occur in either direction over the Narrows Bridge for a total of 800 trips per day. 4) The forecast average weekday traffic volumes mentioned in 2 (a) and (b) above were obtained from Main Roads Transport Model using 24 hour Annual Average Weekday Traffic data. These estimates are regularly updated and verified using input from observed traffic counts and "trend case" land use forecast information from the Department for Planning and Infrastructure. (5) Not applicable.
Time 1-Jul-04 1-Jul-04 NB SB Combined 0-1 370 532 902 1-2 184 286 470 2-3 122 196 318 3-4 117 193 310 4-5 222 244 466 5-6 771 829 1600 6-7 2999 2494 5493 7-8 6479 4523 11002 8-9 7653 5522 13175 9-10 6108 4389 10497 10-11 4567 3893 8460 11-12 4297 4046 8343 12-13 4413 4529 8942 13-14 4264 4542 8806 14-15 4302 4910 9212 15-16 4623 6392 11015 16-17 5429 7741 13170 17-18 5803 7558 13361 18-19 4441 6675 11116 19-20 2945 3561 6506 20-21 1782 2489 4271 21-22 1641 2436 4077 22-23 1358 2005 3363 23-24 772 1232 2004 Total 75662 81217 156879 2) (a) Approximately 169 000 vehicles per average weekday. (b) Approximately 183 200 vehicles per average weekday. These predictions do not take account of the very significant potential impact on car usage resulting from higher oil prices and dwindling supplies that the world economy will certainly face in future years. Insofar as the Public Transport Authority is concerned: 3) Currently on a typical weekday, there are 595 Transperth bus trips travelling north over the Narrows Bridge and 596 Transperth bus trips travelling south. · On 1 July 2010, after a significant number of Transperth bus trips are replaced by the southern rail line, it is estimated that 270 bus trips will travel north over the Narrows Bridge and 270 bus trips will travel southward. · On 1 July 2020, it is difficult to accurately predict the number of Transperth bus trips at this time given the degree of change in travel behaviour and transport technology. However, as an estimate based on existing public transport growth patterns, in the order of 400 bus trips would occur in either direction over the Narrows Bridge for a total of 800 trips per day. 4) The forecast average weekday traffic volumes mentioned in 2 (a) and (b) above were obtained from Main Roads Transport Model using 24 hour Annual Average Weekday Traffic data. These estimates are regularly updated and verified using input from observed traffic counts and "trend case" land use forecast information from the Department for Planning and Infrastructure. (5) Not applicable.
2) (a) Approximately 169 000 vehicles per average weekday. (b) Approximately 183 200 vehicles per average weekday. These predictions do not take account of the very significant potential impact on car usage resulting from higher oil prices and dwindling supplies that the world economy will certainly face in future years. Insofar as the Public Transport Authority is concerned: 3) Currently on a typical weekday, there are 595 Transperth bus trips travelling north over the Narrows Bridge and 596 Transperth bus trips travelling south. · On 1 July 2010, after a significant number of Transperth bus trips are replaced by the southern rail line, it is estimated that 270 bus trips will travel north over the Narrows Bridge and 270 bus trips will travel southward. · On 1 July 2020, it is difficult to accurately predict the number of Transperth bus trips at this time given the degree of change in travel behaviour and transport technology. However, as an estimate based on existing public transport growth patterns, in the order of 400 bus trips would occur in either direction over the Narrows Bridge for a total of 800 trips per day. 4) The forecast average weekday traffic volumes mentioned in 2 (a) and (b) above were obtained from Main Roads Transport Model using 24 hour Annual Average Weekday Traffic data. These estimates are regularly updated and verified using input from observed traffic counts and "trend case" land use forecast information from the Department for Planning and Infrastructure. (5) Not applicable.
(b) Approximately 183 200 vehicles per average weekday. These predictions do not take account of the very significant potential impact on car usage resulting from higher oil prices and dwindling supplies that the world economy will certainly face in future years. Insofar as the Public Transport Authority is concerned: 3) Currently on a typical weekday, there are 595 Transperth bus trips travelling north over the Narrows Bridge and 596 Transperth bus trips travelling south. · On 1 July 2010, after a significant number of Transperth bus trips are replaced by the southern rail line, it is estimated that 270 bus trips will travel north over the Narrows Bridge and 270 bus trips will travel southward. · On 1 July 2020, it is difficult to accurately predict the number of Transperth bus trips at this time given the degree of change in travel behaviour and transport technology. However, as an estimate based on existing public transport growth patterns, in the order of 400 bus trips would occur in either direction over the Narrows Bridge for a total of 800 trips per day. 4) The forecast average weekday traffic volumes mentioned in 2 (a) and (b) above were obtained from Main Roads Transport Model using 24 hour Annual Average Weekday Traffic data. These estimates are regularly updated and verified using input from observed traffic counts and "trend case" land use forecast information from the Department for Planning and Infrastructure. (5) Not applicable.
These predictions do not take account of the very significant potential impact on car usage resulting from higher oil prices and dwindling supplies that the world economy will certainly face in future years. Insofar as the Public Transport Authority is concerned: 3) Currently on a typical weekday, there are 595 Transperth bus trips travelling north over the Narrows Bridge and 596 Transperth bus trips travelling south. · On 1 July 2010, after a significant number of Transperth bus trips are replaced by the southern rail line, it is estimated that 270 bus trips will travel north over the Narrows Bridge and 270 bus trips will travel southward. · On 1 July 2020, it is difficult to accurately predict the number of Transperth bus trips at this time given the degree of change in travel behaviour and transport technology. However, as an estimate based on existing public transport growth patterns, in the order of 400 bus trips would occur in either direction over the Narrows Bridge for a total of 800 trips per day. 4) The forecast average weekday traffic volumes mentioned in 2 (a) and (b) above were obtained from Main Roads Transport Model using 24 hour Annual Average Weekday Traffic data. These estimates are regularly updated and verified using input from observed traffic counts and "trend case" land use forecast information from the Department for Planning and Infrastructure. (5) Not applicable.
Insofar as the Public Transport Authority is concerned: 3) Currently on a typical weekday, there are 595 Transperth bus trips travelling north over the Narrows Bridge and 596 Transperth bus trips travelling south. · On 1 July 2010, after a significant number of Transperth bus trips are replaced by the southern rail line, it is estimated that 270 bus trips will travel north over the Narrows Bridge and 270 bus trips will travel southward. · On 1 July 2020, it is difficult to accurately predict the number of Transperth bus trips at this time given the degree of change in travel behaviour and transport technology. However, as an estimate based on existing public transport growth patterns, in the order of 400 bus trips would occur in either direction over the Narrows Bridge for a total of 800 trips per day. 4) The forecast average weekday traffic volumes mentioned in 2 (a) and (b) above were obtained from Main Roads Transport Model using 24 hour Annual Average Weekday Traffic data. These estimates are regularly updated and verified using input from observed traffic counts and "trend case" land use forecast information from the Department for Planning and Infrastructure. (5) Not applicable.
3) Currently on a typical weekday, there are 595 Transperth bus trips travelling north over the Narrows Bridge and 596 Transperth bus trips travelling south. · On 1 July 2010, after a significant number of Transperth bus trips are replaced by the southern rail line, it is estimated that 270 bus trips will travel north over the Narrows Bridge and 270 bus trips will travel southward. · On 1 July 2020, it is difficult to accurately predict the number of Transperth bus trips at this time given the degree of change in travel behaviour and transport technology. However, as an estimate based on existing public transport growth patterns, in the order of 400 bus trips would occur in either direction over the Narrows Bridge for a total of 800 trips per day. 4) The forecast average weekday traffic volumes mentioned in 2 (a) and (b) above were obtained from Main Roads Transport Model using 24 hour Annual Average Weekday Traffic data. These estimates are regularly updated and verified using input from observed traffic counts and "trend case" land use forecast information from the Department for Planning and Infrastructure. (5) Not applicable.
· On 1 July 2010, after a significant number of Transperth bus trips are replaced by the southern rail line, it is estimated that 270 bus trips will travel north over the Narrows Bridge and 270 bus trips will travel southward. · On 1 July 2020, it is difficult to accurately predict the number of Transperth bus trips at this time given the degree of change in travel behaviour and transport technology. However, as an estimate based on existing public transport growth patterns, in the order of 400 bus trips would occur in either direction over the Narrows Bridge for a total of 800 trips per day. 4) The forecast average weekday traffic volumes mentioned in 2 (a) and (b) above were obtained from Main Roads Transport Model using 24 hour Annual Average Weekday Traffic data. These estimates are regularly updated and verified using input from observed traffic counts and "trend case" land use forecast information from the Department for Planning and Infrastructure. (5) Not applicable.
· On 1 July 2020, it is difficult to accurately predict the number of Transperth bus trips at this time given the degree of change in travel behaviour and transport technology. However, as an estimate based on existing public transport growth patterns, in the order of 400 bus trips would occur in either direction over the Narrows Bridge for a total of 800 trips per day. 4) The forecast average weekday traffic volumes mentioned in 2 (a) and (b) above were obtained from Main Roads Transport Model using 24 hour Annual Average Weekday Traffic data. These estimates are regularly updated and verified using input from observed traffic counts and "trend case" land use forecast information from the Department for Planning and Infrastructure. (5) Not applicable.
4) The forecast average weekday traffic volumes mentioned in 2 (a) and (b) above were obtained from Main Roads Transport Model using 24 hour Annual Average Weekday Traffic data. These estimates are regularly updated and verified using input from observed traffic counts and "trend case" land use forecast information from the Department for Planning and Infrastructure. (5) Not applicable.
(5) Not applicable.
1). The hourly distribution of flows as at 1 July 2004 across The Narrows Bridge (north bound and south bound) was as follows: Time 1-Jul-04 1-Jul-04 NB SB Combined 0-1 370 532 902 1-2 184 286 470 2-3 122 196 318 3-4 117 193 310 4-5 222 244 466 5-6 771 829 1600 6-7 2999 2494 5493 7-8 6479 4523 11002 8-9 7653 5522 13175 9-10 6108 4389 10497 10-11 4567 3893 8460 11-12 4297 4046 8343 12-13 4413 4529 8942 13-14 4264 4542 8806 14-15 4302 4910 9212 15-16 4623 6392 11015 16-17 5429 7741 13170 17-18 5803 7558 13361 18-19 4441 6675 11116 19-20 2945 3561 6506 20-21 1782 2489 4271 21-22 1641 2436 4077 22-23 1358 2005 3363 23-24 772 1232 2004 Total 75662 81217 156879 2) (a) Approximately 169 000 vehicles per average weekday. (b) Approximately 183 200 vehicles per average weekday. These predictions do not take account of the very significant potential impact on car usage resulting from higher oil prices and dwindling supplies that the world economy will certainly face in future years. Insofar as the Public Transport Authority is concerned: 3) Currently on a typical weekday, there are 595 Transperth bus trips travelling north over the Narrows Bridge and 596 Transperth bus trips travelling south. · On 1 July 2010, after a significant number of Transperth bus trips are replaced by the southern rail line, it is estimated that 270 bus trips will travel north over the Narrows Bridge and 270 bus trips will travel southward. · On 1 July 2020, it is difficult to accurately predict the number of Transperth bus trips at this time given the degree of change in travel behaviour and transport technology. However, as an estimate based on existing public transport growth patterns, in the order of 400 bus trips would occur in either direction over the Narrows Bridge for a total of 800 trips per day. 4) The forecast average weekday traffic volumes mentioned in 2 (a) and (b) above were obtained from Main Roads Transport Model using 24 hour Annual Average Weekday Traffic data. These estimates are regularly updated and verified using input from observed traffic counts and "trend case" land use forecast information from the Department for Planning and Infrastructure. (5) Not applicable.
Time 1-Jul-04 1-Jul-04 NB SB Combined 0-1 370 532 902 1-2 184 286 470 2-3 122 196 318 3-4 117 193 310 4-5 222 244 466 5-6 771 829 1600 6-7 2999 2494 5493 7-8 6479 4523 11002 8-9 7653 5522 13175 9-10 6108 4389 10497 10-11 4567 3893 8460 11-12 4297 4046 8343 12-13 4413 4529 8942 13-14 4264 4542 8806 14-15 4302 4910 9212 15-16 4623 6392 11015 16-17 5429 7741 13170 17-18 5803 7558 13361 18-19 4441 6675 11116 19-20 2945 3561 6506 20-21 1782 2489 4271 21-22 1641 2436 4077 22-23 1358 2005 3363 23-24 772 1232 2004 Total 75662 81217 156879 2) (a) Approximately 169 000 vehicles per average weekday. (b) Approximately 183 200 vehicles per average weekday. These predictions do not take account of the very significant potential impact on car usage resulting from higher oil prices and dwindling supplies that the world economy will certainly face in future years. Insofar as the Public Transport Authority is concerned: 3) Currently on a typical weekday, there are 595 Transperth bus trips travelling north over the Narrows Bridge and 596 Transperth bus trips travelling south. · On 1 July 2010, after a significant number of Transperth bus trips are replaced by the southern rail line, it is estimated that 270 bus trips will travel north over the Narrows Bridge and 270 bus trips will travel southward. · On 1 July 2020, it is difficult to accurately predict the number of Transperth bus trips at this time given the degree of change in travel behaviour and transport technology. However, as an estimate based on existing public transport growth patterns, in the order of 400 bus trips would occur in either direction over the Narrows Bridge for a total of 800 trips per day. 4) The forecast average weekday traffic volumes mentioned in 2 (a) and (b) above were obtained from Main Roads Transport Model using 24 hour Annual Average Weekday Traffic data. These estimates are regularly updated and verified using input from observed traffic counts and "trend case" land use forecast information from the Department for Planning and Infrastructure. (5) Not applicable.
2) (a) Approximately 169 000 vehicles per average weekday. (b) Approximately 183 200 vehicles per average weekday. These predictions do not take account of the very significant potential impact on car usage resulting from higher oil prices and dwindling supplies that the world economy will certainly face in future years. Insofar as the Public Transport Authority is concerned: 3) Currently on a typical weekday, there are 595 Transperth bus trips travelling north over the Narrows Bridge and 596 Transperth bus trips travelling south. · On 1 July 2010, after a significant number of Transperth bus trips are replaced by the southern rail line, it is estimated that 270 bus trips will travel north over the Narrows Bridge and 270 bus trips will travel southward. · On 1 July 2020, it is difficult to accurately predict the number of Transperth bus trips at this time given the degree of change in travel behaviour and transport technology. However, as an estimate based on existing public transport growth patterns, in the order of 400 bus trips would occur in either direction over the Narrows Bridge for a total of 800 trips per day. 4) The forecast average weekday traffic volumes mentioned in 2 (a) and (b) above were obtained from Main Roads Transport Model using 24 hour Annual Average Weekday Traffic data. These estimates are regularly updated and verified using input from observed traffic counts and "trend case" land use forecast information from the Department for Planning and Infrastructure. (5) Not applicable.
(b) Approximately 183 200 vehicles per average weekday. These predictions do not take account of the very significant potential impact on car usage resulting from higher oil prices and dwindling supplies that the world economy will certainly face in future years. Insofar as the Public Transport Authority is concerned: 3) Currently on a typical weekday, there are 595 Transperth bus trips travelling north over the Narrows Bridge and 596 Transperth bus trips travelling south. · On 1 July 2010, after a significant number of Transperth bus trips are replaced by the southern rail line, it is estimated that 270 bus trips will travel north over the Narrows Bridge and 270 bus trips will travel southward. · On 1 July 2020, it is difficult to accurately predict the number of Transperth bus trips at this time given the degree of change in travel behaviour and transport technology. However, as an estimate based on existing public transport growth patterns, in the order of 400 bus trips would occur in either direction over the Narrows Bridge for a total of 800 trips per day. 4) The forecast average weekday traffic volumes mentioned in 2 (a) and (b) above were obtained from Main Roads Transport Model using 24 hour Annual Average Weekday Traffic data. These estimates are regularly updated and verified using input from observed traffic counts and "trend case" land use forecast information from the Department for Planning and Infrastructure. (5) Not applicable.
These predictions do not take account of the very significant potential impact on car usage resulting from higher oil prices and dwindling supplies that the world economy will certainly face in future years. Insofar as the Public Transport Authority is concerned: 3) Currently on a typical weekday, there are 595 Transperth bus trips travelling north over the Narrows Bridge and 596 Transperth bus trips travelling south. · On 1 July 2010, after a significant number of Transperth bus trips are replaced by the southern rail line, it is estimated that 270 bus trips will travel north over the Narrows Bridge and 270 bus trips will travel southward. · On 1 July 2020, it is difficult to accurately predict the number of Transperth bus trips at this time given the degree of change in travel behaviour and transport technology. However, as an estimate based on existing public transport growth patterns, in the order of 400 bus trips would occur in either direction over the Narrows Bridge for a total of 800 trips per day. 4) The forecast average weekday traffic volumes mentioned in 2 (a) and (b) above were obtained from Main Roads Transport Model using 24 hour Annual Average Weekday Traffic data. These estimates are regularly updated and verified using input from observed traffic counts and "trend case" land use forecast information from the Department for Planning and Infrastructure. (5) Not applicable.
Insofar as the Public Transport Authority is concerned: 3) Currently on a typical weekday, there are 595 Transperth bus trips travelling north over the Narrows Bridge and 596 Transperth bus trips travelling south. · On 1 July 2010, after a significant number of Transperth bus trips are replaced by the southern rail line, it is estimated that 270 bus trips will travel north over the Narrows Bridge and 270 bus trips will travel southward. · On 1 July 2020, it is difficult to accurately predict the number of Transperth bus trips at this time given the degree of change in travel behaviour and transport technology. However, as an estimate based on existing public transport growth patterns, in the order of 400 bus trips would occur in either direction over the Narrows Bridge for a total of 800 trips per day. 4) The forecast average weekday traffic volumes mentioned in 2 (a) and (b) above were obtained from Main Roads Transport Model using 24 hour Annual Average Weekday Traffic data. These estimates are regularly updated and verified using input from observed traffic counts and "trend case" land use forecast information from the Department for Planning and Infrastructure. (5) Not applicable.
3) Currently on a typical weekday, there are 595 Transperth bus trips travelling north over the Narrows Bridge and 596 Transperth bus trips travelling south. · On 1 July 2010, after a significant number of Transperth bus trips are replaced by the southern rail line, it is estimated that 270 bus trips will travel north over the Narrows Bridge and 270 bus trips will travel southward. · On 1 July 2020, it is difficult to accurately predict the number of Transperth bus trips at this time given the degree of change in travel behaviour and transport technology. However, as an estimate based on existing public transport growth patterns, in the order of 400 bus trips would occur in either direction over the Narrows Bridge for a total of 800 trips per day. 4) The forecast average weekday traffic volumes mentioned in 2 (a) and (b) above were obtained from Main Roads Transport Model using 24 hour Annual Average Weekday Traffic data. These estimates are regularly updated and verified using input from observed traffic counts and "trend case" land use forecast information from the Department for Planning and Infrastructure. (5) Not applicable.
· On 1 July 2010, after a significant number of Transperth bus trips are replaced by the southern rail line, it is estimated that 270 bus trips will travel north over the Narrows Bridge and 270 bus trips will travel southward. · On 1 July 2020, it is difficult to accurately predict the number of Transperth bus trips at this time given the degree of change in travel behaviour and transport technology. However, as an estimate based on existing public transport growth patterns, in the order of 400 bus trips would occur in either direction over the Narrows Bridge for a total of 800 trips per day. 4) The forecast average weekday traffic volumes mentioned in 2 (a) and (b) above were obtained from Main Roads Transport Model using 24 hour Annual Average Weekday Traffic data. These estimates are regularly updated and verified using input from observed traffic counts and "trend case" land use forecast information from the Department for Planning and Infrastructure. (5) Not applicable.
· On 1 July 2020, it is difficult to accurately predict the number of Transperth bus trips at this time given the degree of change in travel behaviour and transport technology. However, as an estimate based on existing public transport growth patterns, in the order of 400 bus trips would occur in either direction over the Narrows Bridge for a total of 800 trips per day. 4) The forecast average weekday traffic volumes mentioned in 2 (a) and (b) above were obtained from Main Roads Transport Model using 24 hour Annual Average Weekday Traffic data. These estimates are regularly updated and verified using input from observed traffic counts and "trend case" land use forecast information from the Department for Planning and Infrastructure. (5) Not applicable.
4) The forecast average weekday traffic volumes mentioned in 2 (a) and (b) above were obtained from Main Roads Transport Model using 24 hour Annual Average Weekday Traffic data. These estimates are regularly updated and verified using input from observed traffic counts and "trend case" land use forecast information from the Department for Planning and Infrastructure. (5) Not applicable.
(5) Not applicable.
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