NDLI: An investigation of proportionally fair ramp metering

Content Provider	IEEE Xplore Digital Library
Author	Gibbens, R.J. Kelly, F.P.
Copyright Year	2011
Description	Author affiliation: Statistical Laboratory, University of Cambridge, Cambridge, UK, CB3 0WB (Kelly, F.P.) \|\| Computer Laboratory, University of Cambridge, Cambridge, UK, CB3 0FD (Gibbens, R.J.)
Abstract	This paper concerns ramp metering which is one important approach to dealing with congestion on motorways. Congestion occurs when demand exceeds available resources and can significantly reduce the capacity of the motorway network at peak times. Reduced capacity results in additional delays, increased environmental pollution and hinders passenger safety. Congestion is observed to cause low but highly volatile speeds resulting in more uncertain journey times (referred to as flow breakdown or stop-and-go behaviour). Ramp metering is intended to control the entry of new flow in such a way as to maintain steady flow on the motorway and to avoid the loss of capacity associated with congestion. The rate of entry of flow is set according to the particular ramp metering strategy. Such strategies have been the subject of much attention in the transport literature. One of the key issues is the trade-off between efficiency and fair use of resources. This is a trade-off that has been considered extensively in the modelling and control of communication networks. This paper adds to recent work on a ramp metering strategy, proportionally fair metering, inspired by rate control mechanisms developed for the Internet. Specifically, we use simulation results to compare proportionally fair metering with a greedy strategy for a linear network with a series of entry points leading towards a single common destination for all the traffic, such as a radial route towards a city centre. Under our modelling assumptions, the greedy strategy is provably optimal for exogenously determined arrival streams of traffic, but it is unfair, in a certain precise sense, between different entry points and may well have perverse and suboptimal consequences if it influences traffic demand. We further consider a network with parallel roads where flows of traffic may have route choice according to the levels of queueing at the individual entry points.
Starting Page	490
Ending Page	495
File Size	547455
Page Count	6
File Format	PDF
ISBN	9781457721984
ISSN	21530009
e-ISBN	9781457721977
DOI	10.1109/ITSC.2011.6082812
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-10-05
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Roads Delay Vehicles Simulation Internet Throughput Optimization
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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