The Freeway Service Patrol Project and the I-880 Database
This is a home page for the Freeway Service Patrol Project. This
project is run under the PATH program at
The University of California, Berkeley.
This document will
allow you to retrieve the results from the study, download
various parts of the I-880 database, and download the software written
to process the database.
Any questions about this document should be mailed
to Karl Petty at
pettyk@eecs.berkeley.edu.
What is the FSP project?
The FSP project was an attempt to determine the benifit to cost ratio of
roving tow trucks. There is a short
description on-line that talks about the experiment, the database and
the software to process the data. There is also an
executive summary
that describes the project in a few paragraphs.
The main results of the experiment
were published in a PATH report but that report is not on-line.
You
can get the address for ordering the report here.
If all that you want is a written summary of the data collected and
the processing done then you can
download this paper.
WARNING: If you are going to be using the loop data
with a small output period then you should definitely read this
short paper that describes the problems that arise when doing this.
What is the I-880 database?
Although the results of the FSP project were interesting, it seems
that everybody is after the data that was collected during the experiment.
All of the data for the experiment is online. Everything can be downloaded
via these homepages and you can push it around.
Below are some samples of the I-880 database.
If you would like to view the loop data and the incidents then you can
look through the pages given below. They list out all of the incidents
and let you view the density contours for all of the days. You can
look up the incident type and see if it had any effect on the traffic
stream! You can also use this to download the processed loop data
for specific days.
Density Plots with Incidents:
Note that this data was generated from a 30 second output period and
it was filtered with an exponential filter with a coefficent of 0.9.
You can also take a look at some other types of plots that you can generate
from the data:
Characteristic Traffic Flow Plots:
These are the traffic flow plots for free-flow conditions and then incident
conditions. It is interesting to see the contrast. Can you use this to
detect incidents?
Probe Vehicle Plots:
A small sample of the types of plots that the fsp program
can extract from the probe vehicle data are given below:
But why, Karl? Why?
It's a valid question to ask, "why did you put all of this data
on-line?" Well, the reason is that I was being overwhelmed by
researchers requesting pieces of loopdata where there was an incident.
Now, instead of me looking for a section of working loop detectors that
have an incident just downstream, everybody else can do it themselves.
What can I download?
Everything. But I would strongly
recommend that you download the manual
first and read the first couple of chapters so that you can figure out
what you want.
The buttons below will allow you to download the various parts of the
incident database and the support software. When you click on a button
the world wide web browser that you are using will download the appropriate
piece of software and ask you where you would like for it to be placed.
Downloading request:
All of the support software and data if freely available for you to
download and to use as you wish. If you download the data we would
appreciate it if you let us know. We are interested in seeing where
the data gets used. We also request that if you publish something
using this data that you send us a note and let us know when and where
your paper was published.
The fsp software and the manual:
The support software for the xfsp program:
The data:
Who's responsible for this? (alphabetical)
FSP Project / Karl Petty / 14 August 1995
Haitham Al-Deek