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EXISTING ITS INFRASTRUCTURE
700MH TWO-WAY RADIO / MARYLAND FiRST
The Statewide public safety 700mh radio network of portable and mobile two-way radios Maryland FiRST(First Responder Radio System Team)
The Maryland FiRST system creates interoperability between 12,000 users around the state, county, and municipalities. The system can be accessed during events by 19,000 additional users from local, other state, and federal public safety radios
RADIO TOWERS & TOWER LIGHTING
TOWER MONTORING AND SECURITY
The Maryland First radio tower monitoring system alerts the DOT when tower shelter doors are accessed, during tower lighting failures, HVAC failures, and for generator alerts
The tower camera systems have 4 or more cameras and are installed at towers to monitor access to the tower and shelter
The grounding system for the tower is also monitored to prevent theft of the copper grounding line
RADIO TOWER SHELTERS AND GENERATORS
Radio tower shelters house communication equipment for multiple agencies such as public safety, the700MHz radio system, State Police, and other agencies
Propane gas levels are monitored to keep critical public safety infrastructure operational
BACKUP CONSOLES FOR STATE OPERATIONS CENTER
The DOT maintains backup consoles for the State Operations Center, which are tested and utilized in the event that staff need to be relocated due to an outage or emergency
The backup consoles have identical functionality to existing systems and software. The backup consoles are monitored, and an alert would be generated with any outage
AVL VEHICLE TRACKERS
Automatic Vehicle Locators are used to track State owned fleet vehicles
The DOT plans to integrate this system with fleet management software in the near term
AVL ASSET TRACKERS
Automatic Vehicle Locators are used to track valuable equipment such as Portable Dynamic Message Signs and portable generators
FIBER OPTIC NETWORK
Primarily built in underground conduits along MDOT right of way
The DOT plans to expand the Fiber Optic network to support public safety and CAV
CCTV CAMERAS
The video feeds are available to the public through CHART website and MView
The 171 CCTV Cameras are critical to highway operations and are prioritized for maintenance and repair
RWIS WEATHER STATIONS
The Road Weather Information Sensors (RWIS) allow for real-time monitoring of weather events and road conditions during weather events
Data from the 54 Statewide RWIS devices helps MDOT SHA to prepare, pre-treat, monitor road salinity, and clear roadways of snow
NON-INVASIVE ROAD SENSORS
Mounted to existing CCTV & DMS structures
Can detect the thickness of water, snow or ice within 1mm of accuracy in real time
Measures surface temperature, road condition, and freeze point/salt concentration on the road surface
MARWIS SENSORS
MARWIS devices provide real-time road conditions in any location. They are attached to the back of a truck to collect road conditions before, during, and after weather events.
The data includes date and location, so the historical information is available for future use.
DYNAMIC MESSAGE SIGNS
RWIS and NIRS send automatic updates to the DMS signs with pre-programmed messages for weather related events
PORTABLE DYNAMIC MESSAGE SIGNS
RTMS SENSORS
The 175 RTMS (Remote Traffic Microwave Sensors) units monitor traffic speed and keep count of the number of vehicles using the intersection or roadway
The technology uses a small radar to determine volume, occupancy, speed and classification information
HIGHWAY ADVISORY RADIO (HAR)
49 off-road sites that consist of a standing pole, antenna, and ground plain used to broadcast highway advisory information to motorists
SHAZAM (SHA Zone Advisory Messages) are overhead or road-level signs that inform motorists to tune their radios to 1610AM to receive traffic, emergency, and travel information broadcasted by the HAR
FOG WARNING ALERT SYSTEM
Tied to weathers stations in Western MD, the fog warning alert system works with a visibility sensor
There are two systems currently located at Savage Mountain and Keyser’s Ridge. If the visibility sensor reaches below a certain threshold, it will send a signal to the flashers to alert travels that there’s fog in the area.
TRAFFIC SIGNALS AND CABINETS
BATTERY BACKUPS
PORTABLE GENERATORS
Advanced Vehicle Installation
The DOT installs and modifies lighting, radio, and service for MDOT emergency vehicles, and installs cameras, sensors, lights, sirens, repairs
DECOMMISIONING DEVICES
Devices that are no longer in use need to be removed
RESOURCE SHARE
Other agencies and private industry may co-locate devices on MDOT SHA towers or place conduit and fiber in MDOT SHA right of way
Resource Share agreements create an equal playing field for all agencies to share access
LUFFT OPERATIONAL PERCENTAGES
CCTV OPERATIONAL PERCENTAGES
COMMUNICATIONS STRATEGY& NEXT STEPS
OPERATIONS STRATEGY
PURPOSE STATEMENT
“Through teamwork and technology, use active traffic management to improve the operations of the State’s highway and arterial roadway network and advise customers of traffic conditions.”
• RAMP METERING• VARIABLE SPEED LIMIT• HARD SHOULDER RUNNING • LANE USE CONTROL• TRAFFIC SIGNAL OPERATIONS• MANAGED LANE OPERATIONS
OPERATIONS STRATEGY
OPERATIONS STRATEGY
IMPLEMENTATION
• STAGED ACCORDING TO PRIORITIZED KEY ARTERIAL• CORRIDORS THAT ARE RECOMMENDED TO REDUCE• RECURRING CONGESTION LEVELS• IMPROVE TRAFFIC CONDITIONS
NEXT STEPS
• Prioritize freeway and arterial corridors, based on operational need• Develop communications preferences for each device type. (Minimum
requirements and ultimate)• Create a matrix ranking of priority device types and corridors.• Create a plan deployment plan, project sheets and costs for
mainstreaming communications projects.
OPERATIONS STRATEGY EXPANDED
RAMP METERING
Ramp Metering System (RMS) – Ramp metering is currently being deployedin select corridors (i.e. I-270 corridor) as a means to control the rate ofvehicles entering a limited access facility. Ramp metering can be deployedas a signals system with timing plans developed for corridor peakconditions, or as an adaptive (traffic-responsive) system that can optimizeon corridor traffic conditions with adaptive control software. AssociatedITS roadside devices are traffic signals and signal controllers, warningsignage (static and flashing beacon signage), microwave vehicle detection(for mainline at RMS location), stop bar detection (microwave or loop), andCCTV surveillance. RMS control software is also required for activemanagement of the system from the Traffic Operations Center.
VARIABLE SPEED LIMIT
Variable Speed Limit System – Variable speed limit strategies are deployed to adjust the posted speed limit within a corridor due to traffic conditions, weather conditions, or incident management purposes. Variable speed limit systems, when deployed with roadside detection, can be adjusted according to measured vehicle speeds to help regulate traffic flow within a corridor. Variable speed limit systems can be deployed as regulatory (enforceable) signage. Associated ITS roadside devices are Variable Speed Limit Signs (VSLS), microwave vehicle detection (corridor wide), CCTV surveillance
HARD SHOULDER RUNNING
Hard Shoulder Running (Dynamic Shoulder Lane) – During peak periods, a hard-shoulder running operational strategy can allow for the use of the shoulder as an additional travel lane to increase roadway capacity. The use of hard shoulder running requires capability at the Traffic Operations Center for managing incident scenarios and ensuring the shoulder travel lane is maintained for travel use (e.g. clear of roadway debris, etc.). Associated ITS roadside devices are Lane Use Control Signs (LUCS), microwave vehicle detection (corridor wide), Variable Message Signs (VMS), and CCTV surveillance.
LANE USE CONTROL SYSTEM
Lane Use Control System - Lane control sign systems deployed along a corridor allow for the opening/closing of individual travel lanes according to traffic conditions or incident management purposes. Advance warning signage for drivers is required prior to lane closures and is implemented through Lane Use Control Signs and Variable Message Signs containing traveler information warnings. Lane use control systems are often deployed along with hard shoulder running strategies and require monitoring/control software for active management and monitoring of the system from the Traffic Operations Center. Associated ITS roadside devices are Lane Use Control Signs (LUCS), Variable Message Signs (VMS), microwave vehicle detection (corridor wide), and CCTV surveillance.
TRAFFIC SIGNAL OPERATIONS
Traffic Signal Operations – Real-time monitoring and management of traffic signals from the Traffic Operations Center allows for integrated corridor management operational strategies to be implemented during recurring traffic congestion as well as during incident management scenarios (e.g. along designated diversion routes). The management of traffic signals could additionally involve adaptive (traffic-responsive) signal technology for signals to optimize on corridor traffic conditions with adaptive control software. Associated ITS roadside devices are traffic signals and signal controllers, microwave vehicle detection, stop bar detection (e.g. video detection), and CCTV surveillance. Traffic signal control software is also required for active management of the system from the Traffic Operations Center.
MANAGED LANES
Managed lanes facilities are implemented to provide an alternative for reliable travel times within a corridor through lane management strategies such as toll pricing, vehicle eligibility (e.g. HOV vehicles) and access control (ingress/egress points along a corridor). The active traffic management component can apply to a limited number of roadway lanes and is typically monitored by the Traffic Operations Center and Tolling Operator if applicable. Managed lanes facilities could involve other operations strategies discussed, such as Ramp Metering Systems (RMS), Variable Speed Limit Systems, Hard Shoulder Running Operations, and Lane Use Control Systems. Associated ITS roadside devices are toll rate signs, Lane Use Control Signs (LUCS), Variable Speed Limit Signs (VSLS), Variable Message Signs (VMS), microwave vehicle detection, and CCTV surveillance.
