Bus lanes with intermittent priority: Strategy, formulae, and an evaluation

Author(s): Daganzo, Carlos F.
All authors:
Eichler, M., C.F. Daganzo.
Host organisation: CoE Berkeley, USA
Publication year: 2006
Published in:
Transportation Research Part B: Methodological, Vol. 40, No. 9, pp. 731-744, 2006
Research theme: Management and Control, Public Transport
Keywords:
bus lanes, intermittent bus priority, transit signal priority; intelligent transportation systems; advanced public transit systems
Type:
Research article
Summary:
This paper evaluates strategies for operating buses on signal-controlled arterials using special lanes that are made intermittently available to general traffic. The advantage of special bus lanes, intermittent or dedicated, is that they free buses from traffic interference; the disadvantage is that they disrupt traffic. We find that bus lanes with intermittent priority (BLIPs), unlike dedicated ones, do not significantly reduce street capacity. Intermittence, however, increases the average traffic density at which the demand is served, and as a result increases traffic delay. These delays are more than offset by the benefits to bus passengers as long as traffic demand does not exceed by much the maximum flow possible on the non-special lanes; the smaller the excess the better. BLIPs are not intended for roadways nearing or in excess of capacity. The main factors determining whether an intermittent system saves time are: the traffic saturation level; the bus frequency; the improvement in bus travel time achieved by the special lane; and the ratio of bus and car occupant flows. In some scenarios where a dedicated bus lane could not be operated, a BLIP can save to bus and car occupants together as much as 20 persons-min of travel per bus-km. The required conditions for this to happen are quite particular. Typical savings are smaller. Formulae are given.
September 2020
Upcoming Events
Mo Tu We Th Fr Sa Su
v36    1 2 3 4 5 6
v37  7 8 9 10 11 12 13
v38  14 15 16 17 18 19 20
v39  21 22 23 24 25 26 27
v40  28 29 30        

2nd CALL FOR PROJECTS WITHIN THE MAC-PROGRAM

The VREF invites Sub-Saharan based researchers with expertise on sustainable and equitable
mobility and access or related areas, and strong interest in carrying out interdisciplinary research. Open for application until 2020-09-29

MOBILITY GRANT 2020 - MAC-MG 2020

The VREF invites PhD students and advanced master students from Sub-Saharan African (SSA) universities to apply for a Mobility Grant (MG) to support a visit to another SSA university with up to SEK 25 000.

 STUDY VISIT GRANT 2020

The VREF invites PhD students and researchers in early stages of their career to apply for a Study Visit Grant to be supported with up to SEK 30 000.

Each year the Håkan Frisinger Foundation for Transportation Research awards a scholarship to a prominent researcher.

Read more...

Lee Schipper Memorial Scholarships for Sustainable Transport and Energy Efficiency targets supporting the momentum of Lee Schipper’s contribution to the international policy dialogue in these fields.

This yearly award is aimed at supporting young individual researchers and students in is pursuance.

Call extended to April 30, 2020 due to COVID19.

Read more...

Blog! Blog! Blog!

Global Mobility Research

This Meeting of the Minds' blog monthly releases interviews of global transportation researchers from the VREF's Future Urban Transport Program Network.

TheCityFix

This CityFix series, produced by the WRI (World Ressources Institute) Ross Center for Sustainable Cities and supported by the VREF, discusses walking and cycling in cities with a special focus on low- and middle-income countries.

About VREF

The Volvo Research and Educational Foundations (VREF) inspires, initiates and supports research and educational activities through the Future Urban Transport Programme - How to deal with the complexity of urban transport (FUT). 

Our Vision: Sustainable transport for equitable access in urban areas

Read more

© Copyright VREF
2020