rural application of the colorado transportation management system presented at its america, june...
TRANSCRIPT
Rural Application of the Colorado Transportation Management SystemPresented at ITS America,
June 2007, Palm Springs, CA
By Raj Chaudhuri and Ken DePinto
slide 2
Background Colorado Traffic Operations
Center Duties 24/7 Operation Provide Statewide Traveler
Information Maintain and Operate
VMS’s/DMS’s, CCTV’s, Fiber Backbone, 511, etc.
Partnerships With Media, Cities, OEM, Counties, Other
slide 3
I-70 Corridor Characteristics Trip Travel Time
(Approximately 100 miles –Denver International Airport to Vail)
Recreational Traffic Typical Peak Traffic (Friday,
Saturday and Sunday) Drive Time 3-4 hours on
weekends Posted Speed Limit 65 MPH
(Interstate 70) Alternate Routes - 100 plus
mile detours Incidents Are Common
slide 4
Denver to VailInfrastructure
• 15 Dynamic Message Signs (2 portable)
• 11 Remote Traffic Microwave Sensors
• 12 Automatic Vehicle Identifiers
• Communications (Fiber and Cell)
slide 5
Detection Devices
Ramp Meters89
Automatic Traffic Recorders
110
AVIs (400,000 Tagsin Denver Metro)
18
Microwaves121
slide 6
Purpose Alleviates Driver Frustration Provides Drivers Information Prior to Making Travel
Plans Sent to Communities via Internet, Web and Cable
TV (COTRIP.ORG) Spreads Out The Peak Periods Prevents Secondary Incidents One GUI for all devices
slide 7
Future Deployment Ground mount signs Currently Studying Drivers
Perception of Travel Time Plans For Additional
Corridors
slide 8
Get Data AVI Toll Tag Readers
Read and transmit Encrypt and match
AVI Source/destination pairs True vehicle ground speed
Loops / Side fire Radars Read and record point data Every 1 minute collect VOS
data
Collect Data from over 300 devices
slide 9
Process Data Algorithm developed by Dion and Rakha at
Virginia Tech Transportation Institute Adaptive filtering technique Dynamic adjusting
valid window using standard deviations
Applies log normal distribution
Works with low sample rates on freeways and arterials
Adjusts rapidly by dropping its floor or ceiling
Weighted % result ( AVI 70pctw + RTMS 20pctw + Rampmeters10pctw )
Calculates Speed, Volume Occupancy and Travel time every 2 minutes
slide 10
View Data GIS based
map client Speeds Devices by
status
slide 11
View Data View Segment
slide 12
View Data View Route
slide 13
Generate Alarms Segment has speed less than 15 mph for 8 minutes, and / or Segment has occupancy of over 50% for 8 minutes Share data with cities (Denver, Lakewood)
slide 14
Activate Dual Messages Select signs (grouped by
configuration) Type message about
incident Include Speed / Trip Travel
Time messages WYSIWYG editor, spell
checker, message library
slide 15
View VMS Detail Device Status WYSIWYG Message Errors
slide 16
CTMS Statistics 365 Devices in CTMS 0.5 GB of data collected per day
Entire database size is 102.5 GB, containing data from 2/1/2006 All data is being archived and kept forever
136 Variable Message Signs Estimate travel times updated to 15 signs every 3 minutes
121 RTMS & Wavetronics Speed, volume and occupancy data for each lane collected every 30
seconds 89 Ramp Meters
"Type 1 Data" average smoothed speed, occupancy, and volume data for each ramp meter collected every 20 seconds
"Type 2 Data" average speed, occupancy, and volume data for each ramp meter and lane collected every 1 minute
19 AVI Toll Tag Readers Speed and travel time from source AVI to destination AVI calculated for each
vehicle immediately after it passes the destination AVI and stored in the database
slide 17
Events Scheduled Construction Maintenance Courtesy Patrol Closures/Incidents
slide 19
Appendix The information in the appendix contains details about the CTMS
application including: screen shots, high level technical information, cdot toc facility and references
slide 20
Innovation: Integrate Any Device…
OtherDevice
DMSContainer
Configuration
Manage/Control
Scheduling
Alarms
Security
Logging
InstructionQueueing
ConnectionPooling
Notifications
Locking
ConnectionManagement
CTMSCore Services
CommunicationsRuntime
Environment
RTMSContainer
RTMS
DynamicMessage
Signs
Toll Tag Readers
RampMeters
slide 21
Innovation: Across Any Network Topology
JMUX
FiberOptic
serial
JMUX
Com3
DigiBox Server
Ethernet
serial
CTMS
Com3
DEVICES
serialserial
CTMS
Com3
WirelessNetwork
CTMS
TCP/IP
DEVICEModem Bank
Cell Phone
Land Line
Modem Bank
CDMAModem
TCP/IP
DEVICE
Ethernet
Com3
DigiBox Server
Fiber
Modem
IP
slide 22
Technical Architecture
slide 23
Software Architecture
slide 24
Software Architecture - Implemented
in 90% Open Source! Integrated Development Environment
Eclipse IDE J2EE Application Server
JBoss Application Server Messaging Server
JBoss MQ Communications
GNU’s RTXTComm APIs OpenNMS’s JoeSNMP
Scheduling Quartz
Utilities Apache Ant, Commons, JMeter, Logging, Velocity
Operating System RedHat Linux Enterprise
slide 25
Map Navigator
slide 26
Status Console
slide 27
View Segment Detail
slide 28
View Route Detail
slide 29
View AVI Detail Screen
slide 30
View RTMS / Ramp Meter Screens
slide 31
Camera Tours Video content Route data
slide 32
CDOT TOC
slide 33
References Dion, Francois, and Rakha, Hesham “Estimating Dynamic Roadway Travel
Times using Automatic Vehicle Identification Data for Low Sampling Rates”
http://www.gmupolicy.net/its/AVI%20Filter%20Paper%20-%20_TRB%202003%20Submittal_%20-%20Revised.pdf
CDOT Reading Roomhttp://www.cotrip.org/its/ctms_doc/
Enroute Traffic Inc.http://www.enroutetraffic.com