congestion management process (cmp)
DESCRIPTION
Congestion Management Process (CMP). Briefing to the Technical Committee May 2, 2012. What is a CMP?. - PowerPoint PPT PresentationTRANSCRIPT
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Congestion Management Process (CMP)
Briefing to the Technical CommitteeMay 2, 2012
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What is a CMP?
“A congestion management process (CMP) is a systematic and regionally-accepted approach for managing congestion that provides accurate, up-to-date information on transportation system performance and assesses alternative strategies for congestion management that meet state and local needs.”
Source: Congestion Management Process: A Guidebook, USDOT, FHWA
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CMP & Transportation Management Areas (TMA)
• A CMP is required in metropolitan areas where the population exceeds 200,000
• Federal requirements also state that in all TMAs, the CMP shall be developed and implemented as an integrated part of the metropolitan transportation planning process.
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The process includes 6 steps:1. Development of congestion management
objectives;
2. Establishment of measures of multimodal transportation system performance;
3. Collection of data and system performance monitoring to define the extent and duration of congestion and determine the causes of congestion;
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Steps:
4. Identification of congestion management strategies;
5. Implementation activities, including identification of an implementation schedule and possible funding sources for each strategy; and
6. Evaluation of the effectiveness of implemented strategies.
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Approach
Although a CMP is required in every TMA, federal regulations are not prescriptive regarding the methods and approaches that must be used to implement a CMP. This flexibility has been provided in recognition that different metropolitan areas may face different conditions regarding traffic congestion and may have different visions of how to deal with congestion.
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State-of-the-Practice• Staff reviewed CMP’s of 10 similar sized MPOs
– SEMCOG, DRCOG, MTC, MAG, SCAG, SANDAG, etc.
• Shows a wide-range of plans / processes / performance metrics / update schedules
• In most cases, the CMP forms the basis for projects in the LRP
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An on-going process
• The CMP is an on-going process, continuously progressing and adjusting over time as goals and objectives change, new congestion issues arise, new information sources become available, and new strategies are identified and evaluated.
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The Baltimore Region’s CMP
– What are we measuring?– How are we measuring?– What do the numbers say?
– What can we learn from the numbers?– What are we doing about it?– Improving the process
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What are we measuring? • Roadway Measures
– Vehicle volumes (direction, time of day, peak hour, average daily traffic)– Volume/Capacity ratios by direction and time of day– Intersection Level of Service – average queue length, delay– Miles operating at Level of Service (LOS) E or F in peak period– Duration of congestion
• Transit Measures– Average speeds or travel time– Ratio of bus to auto speed (for bus systems)– Average peak period vehicle load factors (passengers per vehicle)
• Travel Time Measures– travel time – the amount of time needed to traverse a segment or corridor– travel speed – usually measured in one of two ways: (a) average travel speed: the
length of a segment divided by the travel time, or (b) spot speed: the speed of a vehicle or a sample of vehicles over a given time interval passing a point along a roadway
– delay – the difference between travel time and acceptable or free-flow travel time– travel time index – ratio of peak-period to non-peak-period travel time.
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How are we measuring?• Using GPS to Monitor Traffic
– Since 1998, BMC has used Global Positioning System units to collect travel time and travel speeds on 30 of the heaviest traveled roadways.
• Aerial Surveys of Congestion – In the past, BMC staff has used extensive aerial surveys to monitor traffic
quality on the freeway system in the metro area. • Traffic Counts
– Since 1990, BMC has collected and maintained traffic count data for area roadways from a number of sources, including SHA.
• I-95 Corridor Coalition Vehicle Probe Project – This is a groundbreaking initiative providing comprehensive and
continuous travel time information on freeways and arterials using probe technology.
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What do the numbers say? Top 10 Bottlenecks
• Spring 2011
If the reported speed falls below 60% of the reference speed, the road segment is flagged as a potential bottleneck. If the reported speed stays below 60% for five minutes, the segment is confirmed as a bottleneck location.
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Top 5 Congested Corridors
Corridors are composed of multiple contiguous bottlenecks totaling at least 3 miles in length
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Rank #1 Congested Corridor
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Congestion on SB - 4/9-13 Morning Peak
Mon Tue Wed Thurs Fri
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Congestion on SB - 4/16-20 Morning Peak
Mon Tue Wed Thurs Fri
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What can we learn from the numbers?
• Identify congested locations and corridors• Understand recurring and non-recurring
congestion patterns• Evaluate and rank projects in the long-range
plan• Calibrate the travel demand model• Develop operational improvements/strategies
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What are we doing about it? – CMP Strategies
• CMP Strategies– Improving Roadway Operations
Adaptive Signal Control (e.g. Riva Road) Regional Traffic Incident Management (TIMBR) Real-time traveler information (511)
– Improve multi-modal Options Transit Bicycle & Pedestrian
• CMP Outcomes– Improve Air Quality – Improve Economy
Freight Mobility
– Improve Safety Strategic Highway Safety Plan (SHSP) Education (e.g. Street Smart)
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Project Name
Project Limits
Improvement Likely Congestion Management Strategies*
Anne Arundel County
MD 175 MD 170 to Howard County line
From AA County line to MD 295 - 2 to 3 lanes. From MD 295 to MD 170 - 4 to 6 lanes
Intersection improvements were studied for the corridor.The County is pursuing additional transit service in the area.BWI Business Partnership is pursuing funding for additional ridesharing in the area.
I-97 MD 32 to US50/301
New roadway in median to accommodate barrier separated managed lanes
Channelized or grade-separated intersections or roundaboutsInterconnected/coordinated traffic signal system
MD 100 AA-Howard County Line to I-97
Inside base widening to add 1-lane per direction
Considering Light Rail to run in median for a portion of the route.Real-time surveillance (CHART) and freeway service patrol for incident managementPark-and-ride lot within a 1-mile radius of project locationChannelized or grade-separated intersections
MD 198 MD 295 to MD 32
Widen MD 198 to provide easier access to Ft. Meade and Odenton Town Center
Reversible, turning, acceleration/deceleration, or bypass lanesHigh-occupancy vehicle facilities or systemsReal-time surveillance/traffic device controlled by a traffic operations centerInterconnected/coordinated traffic signal systemReal-time traveler information (CHART/511)BWI Business Partnership is looking to increase ridesharing in area through a grant. The County is looking to increase transit service in the area.
MD 3 AA-PG County line to MD 32
Improve safety and capacity on MD 3
Channelized or grade-separated intersections or roundaboutsTransit stop within a ½ mile radius of project locationPark-and-ride lot within a 1-mile radius of project locationTraffic operational improvements were considered. This project will incorporate a Michigan U (new type of signal control)
* congestion management strategies listed in this table are based on information provided by local jurisdictions and staff knowledge of existing operational characteristics along these project corridors.
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Improving the process• Adopt Travel Time Reliability Performance
Measures to capture non-recurring congestion patterns (Travel Time Index, Planning Time Index, etc.)
• Form CMP Advisory Group (operations focused)• Link to safety, freight, ITS Architecture and
Management & Operations (M&O)• Coordinate with SHA & Jurisdictions• Continue role in the Interagency Review Process
– link NEPA & Planning
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Next Steps
• Web updates - ongoing• CMP report – end of FY 2012• FY 2013 CMP
– Performance Measurement– Corridor Analysis– Coordinate with mid-Atlantic MPO’s on
reliability measures
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Questions / Comments / Suggestions
• BMC CMP Team Members:Bala Akundi, Bill LeonardBrian Ryder, Ed StylcEileen Singleton, Jason BiernatMonica Haines Benkhedda, Regina ArisTerry Freeland, Victor Henry