gerald l. ullman, ph.d., p.e. texas transportation institute designing and maintaining a...
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Gerald L. Ullman, Ph.D., P.E.Texas Transportation Institute
Designing and Maintaining a Pedestrian-Friendly Work Zone
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The MUTCD is clear!
The needs and control of all road users (motorists, bicyclists, and pedestrians…) through a TTC zone shall be an essential part of highway construction, utility
work, maintenance operations…
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Pedestrians should…
…not be led into conflicts with work vehicles, equipment or operations
…not be led into conflicts with vehicles moving through or around work site
…be provided with a reasonably safe, convenient, and accessible path
…not have their route severed due to parked vehicles or equipment
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Pedestrian TCP Design Checklist
Diversion Route Considerations
Pedestrian/Work Area Separation
Pedestrian/Vehicle Separation
Pathway Width and Surface Needs
Detectable Edging Requirements
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TCP Design Checklist (cont’d)
Canopied Walkway Needs Sight Line Maintenance Provision of Pedestrian
Guidance Information Other Intersection Needs Mitigate Path Obstructions Access to Transit Stops,
Businesses, Residences
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Diversion Route ConsiderationsPriorities:1. Parking lane next to work
site2. Closed travel lane next to
work site (if multi-lane facility)
3. Sidewalk or path across the street
In some cases, a temporary traffic barrier may be
needed
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Pedestrian/Work Area SeparationPositively protect
excavations or drop-offsFences or barriers to
prevent pedestrian access into work site
Fences or barriers should be
high enough to prevent climbing over
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Pedestrian/Vehicle SeparationBarriers may be
neededHigh-speed traffic
situationsDesigned to prevent
intrusionsBarricades or
channelizing devices may be sufficientDetectable edging
requiredContinuous path
provided
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Pathway Width and Surface Needs5 ft width desirableIf less than 5 ft,
provide a 5 ft by 5 ft space every 200 ft along route
3 ft absolute minimum, unless special provisions provided for wheelchairs
Path must be smooth, continuous, hard surface
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Detectable EdgingContinuous plastic,
metal, wood, etc.Bottom rail a maximum
of 6 inches above ground
Rail at hand height desirable
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Canopied WalkwayRequired if potential for
falling debrisLighting may be required
if intended for use at night
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Maintaining Sight LinesDrivers and
pedestrians need to see each other at crossings
Features to check:FencesParkingSignsBridge abutmentsWork vehicles and
equipment
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Pedestrian Information NeedsAdvance information about
sidewalk closuresClear and positive
guidance provided through and around work area
Guidance back to original route provided
Ask yourself: What would I tell a driver?
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Pedestrian Information (cont’d)
Message Design Tips:Provide distances
(blocks or feet)Describe desired action
when possible (“USE OTHER SIDE”)
Orange and black = work zone
SIDEWALK CLOSED1 BLOCK AHEAD
USE OTHER SIDE
SIDEWALK CLOSED1 BLOCK AHEAD
USE OTHER SIDE
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Other Intersection NeedsTemporary
crosswalksTraffic signal
adjustmentsPedestrian
clearanceMaintaining
accessibility
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Mitigate Path ObstructionsNo scaffolding,
fencing, etc., protruding into path
No signs lower than 7 ft extending into path
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Access ConsiderationsTransit stops
Access to businesses, residences also need to be considered
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In-Field Construction ReviewsCheck TCP design at
beginning of project, after each phase change
Include as part of regular inspector reviews throughout project
Be vigilant for “accidental” impacts to pedestrians
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For more information….Checklist for Accommodating Pedestrians in
Temporary Traffic Control Areas, December 2007, http://tti.tamu.edu/documents/0-5237-P1.pdf
FHWA Work Zone Safety Grant Program http://www.workzonesafety.org/fhwa_wz_grant/atssa/atssa_pedestrian_checklist http://www.workzonesafety.org/fhwa_wz_grant/atssa/atssa_guidance_sheet
Gerald UllmanTTI(979) [email protected]