The Americans with Disabilities Act (ADA) requires each city to create an ADA Transition Plan. Part of this transition plan is conducting a self-evaluation. The only way to evaluate curb ramps and traffic signals for accessibility standards is by conducting a field survey.
Once your curb ramp survey is complete, you will receive a complete dataset of your intersections, curb ramps, traffic signals, and crosswalks. Theis dataset includes an accessibility compliance assessment for each element, as measured against the current specifications in the Public Right-of-Way Accessibility Guidelines (PROWAG). You will also receive a link or access to an FTP account to download all photos taken.
We only use the iPad 2 to conduct NVCRIS surveys because it has the most accurate accelerometer of all iPad models. On its own, the accelerometer has an error range of +/- 0.5 percent slope. However, we have developed a system of calibrating the iPads, and once calibrated, the error range drops to +/- 0.1 percent. For measurements that fall within this error range, we will also take a manual measurement with a digital level.
NVCRIS collects all measurements that are covered by the Public Right-of-Way Accessibility Guidelines (PROWAG) specifications. These measurements include the slope of ramps, flares, landings and adjacent sidewalks, the dimensions of ramps and landings, the presence of detectable warnings, the height of signal buttons, and all of the guidelines for Accessible Pedestrian System (APS) implementation. The presence of any obstructions, cracks or sudden level changes are also recorded.
Absolutelely! We can send you data extracts from your project as often as you'd like to see it.