Transit vehicles as traffic probe sensors
FW Cathey, DJ Dailey - Transportation Research Record, 2002 - journals.sagepub.com
New algorithms are presented that use transit vehicles as probes for determining traffic
speeds and travel times along freeways and other primary arterials. A mass transit tracking
system based on automatic vehicle location data and a Kalman filter used to estimate
vehicle position and speed are described. A system of virtual probe sensors that measure
transit vehicle speeds by using the track data is also described. Examples showing the
correlation between probe data and inductance loop speed-trap data are presented. Also …
speeds and travel times along freeways and other primary arterials. A mass transit tracking
system based on automatic vehicle location data and a Kalman filter used to estimate
vehicle position and speed are described. A system of virtual probe sensors that measure
transit vehicle speeds by using the track data is also described. Examples showing the
correlation between probe data and inductance loop speed-trap data are presented. Also …
Transit vehicles as traffic probe sensors
FW Cathey, DJ Dailey - ITSC 2001. 2001 IEEE Intelligent …, 2001 - ieeexplore.ieee.org
We present new algorithms that use transit vehicles as probes for determining traffic speeds
and travel times along freeways and other primary arterials. We describe the use of vehicle
locations produced by an automatic vehicle location (AVL) system, the King County Metro
Transit AVL System, to construct" speed sensors" on every road segment over which transit
vehicles travel. We present the resulting estimates of speed and use that data to estimate
travel times.
and travel times along freeways and other primary arterials. We describe the use of vehicle
locations produced by an automatic vehicle location (AVL) system, the King County Metro
Transit AVL System, to construct" speed sensors" on every road segment over which transit
vehicles travel. We present the resulting estimates of speed and use that data to estimate
travel times.
[BUCH][B] AVL-equipped vehicles as traffic probe sensors
DJ Dailey, FW Cathey - 2002 - depts.washington.edu
In this report, we present new algorithms that use transit vehicles as probes to determine
traffic speeds and travel times along freeways and other primary arterials. We describe a
mass transit tracking system based on automatic vehicle location (AVL) data and a Kalman
filter to estimate vehicle position and speed. We also describe a system of “virtual” probe
sensors that measure transit vehicle speeds using the track data. Examples showing the
correlation between probe data and inductance loop speed trap data are presented. We …
traffic speeds and travel times along freeways and other primary arterials. We describe a
mass transit tracking system based on automatic vehicle location (AVL) data and a Kalman
filter to estimate vehicle position and speed. We also describe a system of “virtual” probe
sensors that measure transit vehicle speeds using the track data. Examples showing the
correlation between probe data and inductance loop speed trap data are presented. We …