Maintenance and Protection of Traffic (MPT)

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Maintenance and Protection of Traffic (MPT) HDM
Ch 16
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Goal

• Safe and adequate maintenance of traffic

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Issues

• Where is traffic going to go?
• Off-site detour
• On-site detour
• Staged Construction
• Temporary roads and ramps
• Temporary structure
• When can contractor work?
• Anytime?
• Non-peak hours?
• Night?
• What signs/markings are needed?
• Consistency with MUTCD

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Others

• Do peds and bicyclists need accommodation?
• Are dedicated police traffic services needed?
• What will be sequencing of MPT?
• What are costs?
• Can capacity and LOS be maintained?

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Off-Site Detours

• Use of state, county or local roads
• Detour lengths?
• Must look _at_ improvements necessary to handle
  increased traffic volumes
• Pavement widths and thicknesses
• Structures
• Guide Railing
• Signs/Signals
• Lateral Clearances

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On-Site Detours

• Staged Construction (build a portion at a time)
• Temporary Roads and Ramps
• Temporary Structures
• Misc
• Must maintain driveway access
• Maintain one or two lanes?
• Should detours be paved?

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Toolbag

• Flaggers
• Pavement markings
• Signs
• Channelizing Devices (cones, tubular markers,
  drums, barricades)
• Barriers
• Arrow panels
• Lights
• Traffic Signals
• Rumble Strips

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Show Overheads

• Must consider how phasing will impact placement
  of materials
• Cross-sections can be used as a tool

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Facilities for Bikes HDM Ch 17
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Bicyclists

• Improvements
• Grates-eliminate or use special grates
• RR crossing-90 degree crossings or reduce
  flangeway width
• Pavements-Eliminate irregularities
• TCS-Check clearance interval

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Bicycle Provisions

• Wide Curb lanes
• Urban areas
• 14 of usable pavt width (wider if possible)
• Shoulders
• Rural areas
• gt 4 (wider if vehicle speed gt 35 mph, gt5 HV,
  obstructions, children, ped use of shoulders

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Shared Lane
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Bicycle Provisions

• Bicycle Lane (portion of roadway designated for
  bicyclists)
• Used on bicycle routes mapped by MPOs
• 4 min. width
• Can be conflicts
• Bicycle Path (bikeway physically separated from
  veh. Traffic)
• Design similar to road

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Bike Lanes
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Bike Lane w/ Parking
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Facilities for Peds HDM Ch 18
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Pedestrians-Importance

• 2000 Census
• New York State--30 of residents dont own cars
• Estimated pedestrian AADT-- 20 million trips
• As population ages, expect more pedestrian use

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Pedestrians and Bicyclists

• By law, pedestrians and bicyclists can use
  unlimited access highways and streets.
• Low Volume Facilities-share roadway w/ vehicles
• High Volume Facilities-best to separate traffic
  streams
• Reduce accident potential
• Decrease travel time

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Maintenance

• NYSDOT does not maintain sidewalks, bikepaths or
  bicycle parking facilities.
• Local government agency must pass a resolution
  agreeing to maintain these facilities before they
  are built (new policy?)

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Assessing Needs-Land Use

• Residential
• Business/commercial
• Mixed commercial/residential
• Industrial
• Recreational
• Educational
• Agricultural/Open Space

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Assessing Needs-Generators

• Major employment centers
• Schools
• Parks
• Shopping Centers
• Residential Neighborhoods
• Medical Centers
• Colleges and Universities
• Bus Stops
• Transit Stations
• Recreation Areas

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Existing Characteristics

• Special User Groups
• Trip Purpose
• Frequency of Use
• Volumes

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Existing Accommodations

• Locations of walkways, bikeways, shoulders and
  worn paths
• Incomplete systems
• Existing signing
• Existing conditions
• Existing features than enhance/reduce feasibility
• Existing Right-of-Way

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Others

• Local plans
• Accident History
• Existing Site Characteristics
• Parking
• Lighting
• Crosswalks
• Signals
• Drainage
• Roadway Surface Condition

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Pedestrian Facilities

• Sidewalks
• 5 minimum (see next slide)
• 2 cross slope
• 7 minimum near parking lanes
• 6-6 vertical clearance
• Shoulders (if no sidewalks)
• Greater than or equal to 4
• Crosswalks
• Traffic Control Features
• Handicapped Accessibility Features

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Ped Accommodations Not Warranted

• Peds prohibited by law
• Cost disproportionate to need
• Sparse Population-Absence of Need