Mac10440 ada poster trb-2
1
0.45 0.25 0.29 0.27 0.49 0.30 0.28 0.30 0.33 0.35 0.28 0.27 0.45 0.37 NE 20TH ST Why is ADA Imporant? • Quality of Life for People with Disabilities • Federal Law • Federal Funding Tied to Compliance • Legal Liability Issues Disabilities affect many people. In Bellevue approximately 15,000 people have one or more disability. Not all disabilities are readily apparent: Below you see an example of how two intersections might be perceived by an individual with a cognitive impairment: Simple street crossing Complex, cluttered street crossing Map 2 GPS Streaming Path Digitized Path The black pts below indicate the same data point referenced to the GPS line and to the digitized line. Note the difference. The map below shows the problem with relying on streaming GPS for mapping purposes. Fortunately, the ULIP technology includes a Distance Measurement Instrument, which records distance from beginning of each data collection (usually 1 block). Using linear referencing, we can then map this data to sidewalk segments which are "heads up" digitized and coded with IDs of the corresponding data collection. The result is much more spatialy accurate data. This does require an extra work effort of digitizing all sidewalks. TopCon GMS-2 hand held GPS Unit used for capture of curb ramp attributes. What is ADA (Americans With Disabilities Act)? ADA is a federal law requiring local governments to ensure that individuals with disabilities are not excluded from programs, services, and activities. This includes access to the pedestrian infrastructure such as sidewalks and curb ramps. All local governments must complete an implementation plan which details locations where the pedestrian infrastructure is not compliant with ADA guidelines. What Data are Jurisdictions Required to Track? • Changes in sidewalk level of more than ¼”. • Grade exceeding 8.3% on continuous runs (higher along road ok). • Cross-slopes exceeding 2%. • Curb Ramps must comply with multiple requirements including slope, grade, width, landings, etc... • Locations of obstructions in pedestrian corridor • More.... Non Compliant Cross Slope Non Compliant Running Slope Non Compliant Displacement Obstruction in Ped Corridor Compliant Curb Ramp Characteristics Non-Compliant X slope Curb Ramps Heaving Locations 0.25" - 0.75' 0.75" - 1" 1" or > Sidewalks Sensor box includes: 1. A displacement laser (texture/profile/height), 2. Three accelerometers (inertial profiling), 3. A gyroscope (pitch, roll, yaw), 4. Optical trigger (reference), 5. GPS (general location), and 6. A DMI (travel distance system). Computer and data acquisition card are used for data capture. Crosswalk 10% max Side flare Curb Ramp Width 2% max slope any direction 3’ min 4’ preferred 8.3% max 4’ min landing Total sidewalk width Sloping surface Ramp Landing Panel Flare Crosswalk Detectable Warning Making Bellevue Sidewalks Accessible for Everyone Author: Franz Loewenherz, Senior Transportation Planner (City of Bellevue, WA) • TRB 2012 Annual Meeting Paper: 12-1439 Acknowledgements: Project Manager: Franz Loewenherz GIS Support: Zorba Conlen ULIP Fabricator: Starodub, Inc. Funding: Federal Highway Administration Methodology Bellevue’s project manager - Franz Loewenherz - worked with the Federal HIghway Administration (FHWA) to secure a prototype ULIP (Ultra Light Inertial Profiler) which is a Segway scooter configured with several devices to measure slope, grade and displacements as it is ridden along the sidewalk. A laser mounted on the bottom of the Segway measures displacement, while a gyroscope mounted on the front captures slopes. All of this data is processed by an on board computer running custom software and tied to GPS coordinates. Further office processing allows for mapping and analyzing the locations of non-compliant features captured in the field. This data is then used to create a transition plan which details how the city will make improvements to the pedestrian system. The technical precision offered by Bellevue’s approach is identified as a best practice in ADA Compliance at Transportation Agencies: A Review of Practices (NCHRP 20-07 Task 249), a Texas Transportation Institute study. The report notes that “efforts such as those at the City of Bellevue, Washington, that rely on the collection of large data sets at extremely fine spatial and temporal disaggregation levels have the potential to significantly automate the identification of non-compliant locations in the field.” SENSOR BOX WITH LASER & GYRO PLATFORM SURFACE CR H2 H1 The device’s lasers, accelerometers, and gyroscope are designed to measure the sidewalk surface at a rate of 10,000 records per second capturing highly accurate informa- tion about slope and small surface variations that can make a sidewalk difficult to navigate
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Transcript of Mac10440 ada poster trb-2
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NE 20TH ST
BEL RED RD
148T
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DA
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EWhy is ADA Imporant?• Quality of Life for People with Disabilities• Federal Law• Federal Funding Tied to Compliance• Legal Liability Issues
Disabilities affect many people. In Bellevue approximately15,000 people have one or more disability. Not alldisabilities are readily apparent: Below you see anexample of how two intersections might be perceived byan individual with a cognitive impairment:
Simple street crossing Complex, cluttered street crossing
Map 2
GPS Streaming Path
Digitized Path
The black pts below indicate the same data point referencedto the GPS line and to the digitized line. Note the difference.
The map below shows the problem with relying on streaming GPS formapping purposes. Fortunately, the ULIP technology includes a DistanceMeasurement Instrument, which records distance from beginning of eachdata collection (usually 1 block). Using linear referencing, we can thenmap this data to sidewalk segments which are "heads up" digitized andcoded with IDs of the corresponding data collection. The result is muchmore spatialy accurate data. This does require an extra work effort ofdigitizing all sidewalks.
TopCon GMS-2 hand held GPS Unitused for capture of curb ramp attributes.
What is ADA (Americans With Disabilities Act)?ADA is a federal law requiring local governments to ensure that individuals with disabilities are notexcluded from programs, services, and activities. This includes access to the pedestrianinfrastructure such as sidewalks and curb ramps. All local governments must complete animplementation plan which details locations where the pedestrian infrastructure is not compliant withADA guidelines.
What Data are Jurisdictions Required to Track?• Changes in sidewalk level of more than ¼”.• Grade exceeding 8.3% on continuous runs (higher along road ok).• Cross-slopes exceeding 2%.• Curb Ramps must comply with multiple requirements including slope, grade, width, landings, etc...• Locations of obstructions in pedestrian corridor• More....
Non CompliantCross Slope
Non CompliantRunning Slope
Non CompliantDisplacement
Obstructionin Ped Corridor
Compliant Curb RampCharacteristics
Non-Compliant X slopeCurb Ramps
Heaving Locations0.25" - 0.75'0.75" - 1"1" or >Sidewalks
Sensor box includes:1. A displacement laser
(texture/pro�le/height),2. Three accelerometers (inertial pro�ling),3. A gyroscope (pitch, roll, yaw),4. Optical trigger (reference),5. GPS (general location), and6. A DMI (travel distance system).Computer and data acquisition card are used for data capture.
Crosswalk
10% max
Side
�are
Curb Ramp
Width
2% maxslope anydirection
3’ min
4’ preferred
8.3% max
4’ minlanding
Total sidewalk widthSloping surface
Ramp
Landing Panel
Flare
Crosswalk
Detectable Warning
Making Bellevue Sidewalks Accessible for EveryoneAuthor: Franz Loewenherz, Senior Transportation Planner (City of Bellevue, WA) • TRB 2012 Annual Meeting Paper: 12-1439
Acknowledgements:Project Manager: Franz LoewenherzGIS Support: Zorba ConlenULIP Fabricator: Starodub, Inc.Funding: Federal Highway Administration
MethodologyBellevue’s project manager - Franz Loewenherz - worked with the Federal HIghway Administration (FHWA) to secure a prototype ULIP (Ultra Light Inertial Pro�ler) which is a Segway scooter con�gured with several devices to measure slope, grade and displacements as it is ridden along the sidewalk.
A laser mounted on the bottom of the Segway measures displacement, while a gyroscope mounted on the front captures slopes. All of this data is processed by an on board computer running custom software and tied to GPS coordinates. Further o�ce processing allows for mapping and analyzing the locations of non-compliant features capturedin the �eld. This data is then used to create a transition plan which details how the city will make improvements to the pedestrian system.
The technical precision o�ered by Bellevue’s approach is identi�ed as a best practice in ADA Compliance at Transportation Agencies: A Review of Practices (NCHRP 20-07 Task 249), a Texas Transportation Institute study. The report notes that “e�orts such as those at the City of Bellevue, Washington, that rely on the collection of large data sets at extremely �ne spatial and temporal disaggregation levels have the potential to signi�cantly automate the identi�cation of non-compliant locations in the �eld.”
SENSORBOXWITHLASER& GYROPLATFORM
SURFACE
CR
H2
H1
The device’s lasers, accelerometers, and gyroscope are designed to measure the sidewalk surface at a rate of 10,000 records per second capturing highly accurate informa-tion about slope and small surface variations that can make a sidewalk di�cult to navigate
