Transcript 8B-Leex - ITE Western District

Innovative System
Communication Design and
Traffic Signal Synchronization
Solutions for San Bernardino
2012 ITE District 6 Annual Conference
Leo Lee, PE
ADVANTEC Consulting Engineers
&
Philip Chu
SANBAG
June 27, 2012
Maximizing ‘Bang for the Buck’
Through Engineering
• Subject – Improving Operational Efficiency of
our Roadway Network
• The Process – Traffic Signal Synchronization
• The Project – San Bernardino County Tier 3
and 4 Traffic Signal System
The Issue
• Currently there are more than 272,000 traffic
signals in the USA
– All need signal timing updates regularly
– Los Angeles ranked no. 1 in America’s Most Congested Cities
(source TTI):
• over 70 hours annual delay per traveler;
• 366,969 excess gallons of gas
• Delay, speed, fuel consumption and air pollution
can be improved by:– Synchronizing Traffic Signals
– Providing traffic signal systems for agencies to monitor traffic
operations
The Process
• Synchronizing Traffic Signals
– Allows maximum operational efficiency of existing
roadways
– Utilizes the existing roadway capacity most effectively
– Reduces delay
– Reduces stops
– Improves speed
– Reduces gas consumption
– Reduces pollutant emissions
– MORE COST EFFECTIVE THAN BUILDING NEW
INFRASTRUCTURE!!
The Project
• San Bernardino Associated Governments
(SANBAG) Comprehensive Traffic Signal System
– More than 1,200 traffic signals
– 15 jurisdictions, including Caltrans
– 545 under Tiers 1 and 2 – completed in 2009
– 678 more in Tiers 3 and 4 currently under way
Tier 3 and 4 Project
San Bernardino County Comprehensive Traffic Signal System
Colton,
San Bernardino City,
Highland,
Loma Linda,
San Bernardino County
Upland,
Rancho Cucamonga,
Ontario
Chino &
Chino Hills,
Caltrans
Fontana,
Rialto
Redlands,
Yucaipa,
Caltrans
Tier 3 and 4 Project
San Bernardino County
Comprehensive Traffic Signal System
Background
– 15 agencies have different traffic signal systems
– ‘Traditional’ signal interconnect are incomplete and
expensive
– Need to provide ‘cheap’ solution
Answer : WIRELESS COMMUNICATION
Wireless Communication Options
Technology
Frequency Band
Spread Spectrum
Serial
Range
Disadvantages
Requires line of sight,
serial interface, limited
bandwidth for future use
Available from multiple
vendors
5-7 miles
Up to 1
Gbps
Higher bandwidth for
future expansion,
available from multiple
vendors, ease of
installation and
operation
Requires line of sight,
susceptible to interference
300 feet
1-11 Mbps
by distance
Increased security vs
Wireless Ethernet
Short range
Equipment is more
expensive up front
902-928 MHz,
2400-2483.5 MHz,
5725-5850 MHz
Wi-Fi
Advantages
Up to 256
Kbps
2 miles
Spread Spectrum
Ethernet
Data
Rates
Estimated Cost
$2,000 Base + $2,000
Each additional
intersection
$2,000 Base + $ 400
Each additional
intersection
$1,100 Base + $ 580
Each additional
intersection
$2,800 Base + $ 500 Each
additional intersection
WiMAX
6 miles
40 Mbps
Larger coverage, more
users, scalable quality of
service, faster data rates
than WiFi
Mesh Network
3 miles per
link
54 Mbps
Self healing, lower
power consumption,
increased data rates
Need more access points
VHF (Very High
Frequency) / UHF
(Ultra High
Frequency
VHF 30 MHz-300
MHz
UHF 300 MHz-3
GHz
hundreds of
miles
10 Kbps
No interference
Licensed frequencies and
equipment needs to be
higher to provide
adequate coverage.
Equipment is expensive.
Cellular Radio
824 - 896 MHz &
1850-1990 MHz
20 miles
9.6 Kbps
Ease of installation and
integration
Reoccurring leased
service costs
$2,700 Base + $2,700
Each additional
intersection
$8,000 Base + $6,000
Each additional
intersection
$450 Base + $20-$35
Monthly fee
Summary of Technology
• Serial-Radios
– Conform to existing communications infrastructure
– Low bandwidth
– Low maintenance and operations costs
• Serial Radio Example
– Many Cities currently use serial radios, e.g. Encom
Summary of Technology
• IP-Radios
–
–
–
–
Ease of management and maintenance
High bandwidth (can support CCTV)
No polling rate issues
State-of-the-art technology
• IP-Radio Example
– Many IP-Radios have proven to be reliable, e.g. Alvarion,
Proxim, Motorola.
Summary of Technology
• Cellular Radio Modems
– For trunk communications between master radio and
TMC
– For remote locations
• Serial / IP Platform
– Several manufacturers support both platforms, e.g.
Raven XT
Ethernet versus Serial
Communications
• Ethernet Technologies
–
–
–
–
Tremendous technological progress in the past 10 years
Many cities migrating from serial towards Ethernet
Can achieve higher bandwidth (and speed)
Can transmit video over radio
• Converting Serial to Ethernet
– Need terminal servers at controllers
– Need virtual communications ports at TMC, or
– Upgrade traffic management systems software that
supports Ethernet (e.g. QuicNet Pro, Centracs)
Requirements for full migration towards
Ethernet
Controllers
Traffic Signal
System
170
QuicNet1
Serial
170/2070
QuicNet Pro
Serial/Ethernet
170
QuicNet1
Serial
If upgraded to QuicNet Pro, and need to upgrade to
170ATC or 2070 controllers
ASC/2/8000/KMC-8000,
Traconex
Icons/Aries
Serial
Need to migrate to Centracs or i2, and replace
controllers with ASC/3 or 2070
Redlands
Naztec 900/Eagle 2070/170
N/A
N/A
Need to implement a traffic signal system that is IP
based, and upgrade controllers to 2070
Rialto
170ATC, ASC/2/2S/3/8000,
Traconex , Synchronex
Aries/QuicNet1
Serial/Serial
If upgraded to QuicNet Pro, and need to upgrade to
170ATC or 2070 controllers
San Bernardino
170/2070
QuicNet1
Serial
If upgraded to QuicNet Pro, and need to upgrade to
170ATC or 2070 controllers
San Bernardino
Co.
Upland
ASC/2/2M/2S/3. Eagle
EPAC M52, Traconex
170/2070
Aries/QuicNet1
Serial/serial
QuicNet Pro
Serial/Ethernet
170/2070
N/A
N/A
If upgraded to QuicNet Pro, and need to upgrade to
170ATC or 2070 controllers
If upgraded to QuicNet Pro, and need to upgrade to
170ATC or 2070 controllers
Need to implement a traffic signal system that is IP
based, and upgrade controllers to 2070
Agency
Colton
Highland
Loma Linda
Ontario
Yucaipa
1 Upgrade
to QuicNet Pro maybe planned.
Communications
Requirements for migrating towards Ethernet?
Supported
If upgraded to QuicNet Pro, and need to upgrade to
170ATC or 2070 controllers
Need to upgrade to 170ATC or 2070 controllers
Requirements for full migration
towards Ethernet
Agency
Caltrans
Controllers
Traffic Signal Communications Requirements for migrating towards
System
Supported
Ethernet?
170
CTNet
Serial
Chino
ASC/2/3S/8000
Aries
Serial
Chino Hills
ASC/2/2S/8000
Aries
Serial
ASC/2/2S/3/8000
Aries
Serial
170/170E/ASC/3/2/2
M/2S/8000, CSC T-1,
Traconex
Aries
Serial
Fontana
Rancho
Cucamonga
Caltrans need to develop Ethernet capabilities
within CTNet
Need to upgrade to Centracs (or other systems),
and replace controllers with ASC/3
Need to upgrade to Centracs (or other systems),
and replace controllers with ASC/3
Need to upgrade to Centracs (or other systems),
and replace controllers with ASC/3
Need to upgrade to Centracs (or other systems),
and replace controllers with ASC/3
Topography Profile
•
Intersections and Paths Being Analyzed
•
Topography Profiles
– See highlighted path shown above
– Shown on the bottom half of the illustration
– Used to determine any land elevation obstructions
Wireless Communication Path Diagrams
• Equipment required
– The diagrams indicate the equipment needed for each
intersection
– Intended to be a generic design that can be adapted to
each City’s equipment selection
Project Cost
• 250 intersections equipped with wireless comm.
• 150 intersections with new controllers
• 87 cellular modems
• Hardware upgrade = $4M
• Average cost = $16,000/intersection
Questions??