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

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Maintenance and Protection of Traffic (MPT) – HDM Ch 16. Goal. Safe and adequate maintenance of traffic. 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?

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Presentation Transcript
slide2
Goal
  • Safe and adequate maintenance of traffic
issues
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
others
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?
off site detours
Off-Site Detours
  • Use of state, county or local roads
  • Detour lengths?
  • Must look @ improvements necessary to handle increased traffic volumes:
    • Pavement widths and thicknesses
    • Structures
    • Guide Railing
    • Signs/Signals
    • Lateral Clearances
on site detours
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?
toolbag
Toolbag
  • Flaggers
  • Pavement markings
  • Signs
  • Channelizing Devices (cones, tubular markers, drums, barricades)
  • Barriers
  • Arrow panels
  • Lights
  • Traffic Signals
  • Rumble Strips
show overheads
Show Overheads

Must consider how phasing will impact placement of materials

Cross-sections can be used as a tool

bicyclists
Bicyclists
  • Improvements:
    • Grates-eliminate or use special grates
    • RR crossing-90 degree crossings or reduce flangeway width
    • Pavements-Eliminate irregularities
    • TCS-Check clearance interval
bicycle provisions
Bicycle Provisions
  • Wide Curb lanes
    • Urban areas
    • 14’ of usable pavt width (wider if possible)
  • Shoulders
    • Rural areas
    • >= 4’ (wider if vehicle speed > 35 mph, >5% HV, obstructions, children, ped use of shoulders
bicycle provisions1
Bicycle Provisions
  • Bicycle Lane (portion of roadway designated for bicyclists)
    • Used on bicycle routes mapped by MPO’s
    • 4’ min. width
    • Can be conflicts
  • Bicycle Path (bikeway physically separated from veh. Traffic)
    • Design similar to road
pedestrians importance
Pedestrians-Importance:
  • 2000 Census:
    • New York State--30% of residents don’t own cars
    • Estimated pedestrian AADT-- 20 million trips
    • As population ages, expect more pedestrian use
pedestrians and bicyclists
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
maintenance
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?)
assessing needs land use
Assessing Needs-Land Use
  • Residential
  • Business/commercial
  • Mixed commercial/residential
  • Industrial
  • Recreational
  • Educational
  • Agricultural/Open Space
assessing needs generators
Assessing Needs-Generators
  • Major employment centers
  • Schools
  • Parks
  • Shopping Centers
  • Residential Neighborhoods
  • Medical Centers
  • Colleges and Universities
  • Bus Stops
  • Transit Stations
  • Recreation Areas
existing characteristics
Existing Characteristics
  • Special User Groups
  • Trip Purpose
  • Frequency of Use
  • Volumes
existing accommodations
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
others1
Others
  • Local plans
  • Accident History
  • Existing Site Characteristics:
    • Parking
    • Lighting
    • Crosswalks
    • Signals
    • Drainage
    • Roadway Surface Condition
pedestrian facilities
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
ped accommodations not warranted
Ped Accommodations Not Warranted
  • Peds prohibited by law
  • Cost disproportionate to need
  • Sparse Population-Absence of Need