Assessing travel time impacts of measures to enhance bus operations. Part II: Assessment criteria and main findings
Jepson, Dale & Ferreira, Luis (2000) Assessing travel time impacts of measures to enhance bus operations. Part II: Assessment criteria and main findings. Road and Transport Research: a journal of Australian and New Zealand research and practice, 9(1), pp. 3-18.
This paper examines the typical travel time impacts of various bus priority measures to assist in the selection of appropriate treatments for particular road networks. A methodology for the selection of bus priority is outlined in this paper. This is based on detailed analysis of the travel time impacts of various bus priority treatments. The provision for bus lanes, bus lane set-back, priority at traffic signals, transit lanes and ticketing systems are assessed here. This work identifies locations where bus priority is suitable to minimise the person delay using an arterial route. Specific criteria for each treatment are developed, showing the break-even point, in terms of person travel time impacts, between savings to bus passengers and penalties to other road users.
The average delay to general traffic and buses was converted to total person delay by using an assumed car occupancy of 1.3 and bus occupancies of 20, 30, 40 and 50 persons. The road layout, intersection spacing and intersection signal control settings, will affect the application of this work. However, this analysis is intended as a generic filter process to select bus priority treatments for further analysis. The use of this filter technique reduces the time involved in assessing the full range of bus priority treatments, as the detailed investigation may be directed at the most likely treatments. Whilst the criteria developed from this work may not be directly adapted for all applications, the methodology is suitable for other circumstances not specifically addressed here.
In the case of bus priorities, the results show instances for which active priority may be justified. While the most significant delay savings for buses may be achieved at high levels of saturation, paradoxically, these situations are the most difficult in which to justify priority for buses. At low levels of saturation, the delay savings for buses are low, yet significant enough to counter the marginal effects on the operations of the general purpose traffic.
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|Item Type:||Journal Article|
|Keywords:||travel time impacts, bus priority, delay|
|Subjects:||Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Transport Engineering (090507)|
|Divisions:||Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering|
|Copyright Owner:||Copyright 2000 ARRB Group|
|Copyright Statement:||Reproduced in accordance with the copyright policy of the publisher.|
|Deposited On:||11 Nov 2005|
|Last Modified:||09 Jun 2010 12:28|
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