Browse Prior Art Database

Road pricing using vehicular communication systems

IP.com Disclosure Number: IPCOM000235482D
Publication Date: 2014-Mar-04
Document File: 3 page(s) / 42K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a system for estimating the density of vehicles within a certain neighborhood of every point on tolled public roads (i.e., a micro-model of traffic), and then applying toll charges relative to a vehicle’s contribution to traffic congestion.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 52% of the total text.

Page 01 of 3

Road pricing using vehicular communication systems

Pricing of goods or services affects the behavior of the purchasers ; hence, a pricing structure should be designed such that it results in the desirable behavior . Most real-world applications of pricing road-use, however, use very simple fixed tolls or fixed schedules for the tolls, which can lead to traffic congestion.

In academic research on dynamic pricing, the focus is on intractable bi-level problems stemming from setting tolls such that the user equilibrium in a particular model of traffic is optimal with respect to a certain objective (e.g., total travel time). In a number of such models (e.g., "Congestion Charges and Welfare" of Vickrey (1969) and "Path Integral Equilibrium" of Friesz and other (1993)), it is recognized that congestion should be penalized. It is not clear, however, how to do so.

An increasing number of vehicles are equipped with vehicle-to-vehicle or vehicle-to-base station communication devices and satellite positioning . The solution leverages this technology in order to accurately estimate congestion and accordingly price road access.

The novel contribution is a system for estimating the density of vehicles within a certain neighborhood of every point on tolled public roads (i.e., a micro-model of traffic), and then applying toll charges relative to a vehicle's contribution to traffic congestion . The system repeatedly computes for each vehicle the distances to others vehicles in the associated vicinity, in a distributed fashion. The system uses satellite positioning systems (e.g., Global Positioning System (GPS)) or other vehicle communication systems. Vehicles in one lane exchange the information needed to compute the prices , and each vehicle computes and records the associated price for itself .

Vehicle-to-vehicle standards are used (e.g., IEEE 802.11p Wireless Access in

Vehicular Environments (WAVE)).

The system uses four mechanisms to determine toll pricing based on traffic congestion :


• The distance to the preceding vehicle


• The distance to the preceding and following vehicle


• The number of vehicles within a distance threshold


• The number of vehicles within a distance threshold weighted by a function of the associated distances

This is possible to perform up to an arbitrary accuracy, with the computation being done

in a distributed, privacy-preserving fashion. A vehicle sends to a preceding vehicle in

the lane its position, perhaps with a counter of such transmissions, but need not reveal an identity otherwise.

To implement this road-pricing scheme, the price for a vehicle X approximates the integral of the density of vehicles over the trajectory of vehicle X. The price for vehicle X depends on the following variables:


• The distance to...