ADA Sidewalk Assessment Data Collection
Dax collects data for ADA sidewalk evaluations using RTK GPS + ground-mounted LiDAR.
Leveraging Robotics for ADA Evaluations
Our state-of-the-art robots are not just another tool in the box. They utilize RTK GPS to gather data with an impressive 2cm accuracy. Equipped with calibrated Keyence IL-300 LiDAR devices, they ensure precise measurement of cracks and uplifts and an IMU to calculate the percentage of both running and cross slopes.
- Uses RTK GPS to obtain a 2cm locational accuracy
- Ground-mounted LiDAR measures the percentage of both running and cross slopes.
- IMU is used to measure angles on slopes
- Employs photogrammetry to present analyzed data in a way that engineers can adjust retrospectively
We can upload data to ARC GIS or create a measurable 3D voxel output using photogrammetry. A variety of applications are possible. Dax can:
- Find the accessible path.
- Create a risk map based on how often a path is traveled and how many hazards are present.
- Create risk maps that show hazards based on mobility limitations, which vary by the disability that an individual is experiencing.
We employ photogrammetry to present analyzed data in a way that can be adjusted retrospectively, providing you with unparalleled flexibility in creating and modifying accessibility reports. This level of precision and reliability is what sets our methodology apart, and it’s what makes our robots truly unique.
Specs
The sidewalk slope measured parallel to the direction of travel: Compliant slopes must be under 1:20 for most paths or 1:12 for ramps.
Locations where the paved surface of the sidewalk has cracked and shows signs of crumbling or movement
Obstruction
Vertical obstructions are objects between 27 and 80 inches off the ground and extending more than 12 inches over the sidewalk, such as awnings or tree branches.
The slope is measured perpendicular to the direction of travel. Cross slopes are "excessive" if more significant than 1:48.
"Settling" happens when sidewalk panels sink, creating a height difference on either side of the sidewalk.
Obstruction
Anchored objects that reduce sidewalk width to less than 36 inches: These include utility poles, fencing, hydrants, sidewalk cafés, and street furnishings.
"Roughness" refers to locations where the paved surface is eroded, rough, or loose.
Vegetative overgrowth, which reduces the visible surface width of the sidewalk to below 36 inches
A vertical change in height along a sidewalk that exceeds ½ inch (or ¼ inch without a bevel)
The sidewalk slope measured parallel to the direction of travel: Compliant slopes must be under 1:20 for most paths or 1:12 for ramps.
Locations where the paved surface of the sidewalk has cracked and shows signs of crumbling or movement
Obstruction
Vertical obstructions are objects between 27 and 80 inches off the ground and extending more than 12 inches over the sidewalk, such as awnings or tree branches.
The slope is measured perpendicular to the direction of travel. Cross slopes are "excessive" if more significant than 1:48.
"Settling" happens when sidewalk panels sink, creating a height difference on either side of the sidewalk.
Obstruction
Anchored objects that reduce sidewalk width to less than 36 inches: These include utility poles, fencing, hydrants, sidewalk cafés, and street furnishings.
"Roughness" refers to locations where the paved surface is eroded, rough, or loose.
Vegetative overgrowth, which reduces the visible surface width of the sidewalk to below 36 inches
A vertical change in height along a sidewalk that exceeds ½ inch (or ¼ inch without a bevel)