Practical, independent guidance across all tactile walking surface indicator categories—from widely used DWS, TDI, and TWD systems to less-common and emerging approaches found in U.S. and international markets—covering what is required, where it belongs, which products are available, how it should perform, and why an existing installation may be failing or rejected.
AccessField guidance is informed by more than two decades of direct TWSI experience in the United States and internationally spanning installation, installer training, product selection, plan and specification review, takeoffs, field troubleshooting, failure analysis, and corrective work. That practical perspective supports the expertise of architects, engineers, inspectors, contractors, and owners by connecting technical requirements to real construction conditions. Reviews are informed by the ADA Standards for Accessible Design, PROWAG, and applicable federal, state, and local criteria, with the focus limited to TWSI decisions and field application.
This 30-day pilot is testing demand, scope, and delivery. Applicants may submit any real TWSI issue within the service scope. Selected participants receive a focused educational review and agree to provide brief feedback. Pilot work is not a compliance certification or a substitute for approval by the project’s design professional or authority having jurisdiction.
Before work begins, we confirm in writing what will be reviewed, the delivery date, and what you will receive. The limits below apply unless we agree to a different scope. Prices shown are planned post-pilot pricing; selected pilot participants are not charged.
A focused call about what type of TWSI is required, its intended use, where it belongs, or which product approaches are available.
Written observations on a failing, deteriorated, or rejected installation—covering documented conditions, likely causes, relevant requirements, and practical corrective options.
Focused review of TWSI selection, layout, details, product availability, installation requirements, and constructability—including a TWSI quantity takeoff based on the supplied plan set.
AccessField’s knowledge extends across the full range of TWSIs—not only DWS, TDI, and TWD—and across the products and installation methods used to create them. That includes less-common systems, new product approaches, and TWSI practices established internationally that may not yet be widely adopted in the United States. We help project teams identify and apply published TWSI requirements under the ADA Standards for Accessible Design, PROWAG, and applicable federal, state, and local criteria.
Send enough context to understand the problem before paid time begins. We confirm the scope first and refer out questions that require a different professional.
Tell us the location, jurisdiction, project type, observed failure, and any inspector comments.
Provide photographs, dimensions, drawings, specifications, product data, or inspection notes.
We select the right service—or tell you if the question belongs elsewhere.
Receive practical observations, probable causes, limitations, and actionable next steps.
Read field-informed introductions to three different tactile walking surface indicators and the questions each helps a project team ask.
What truncated domes tell a pedestrian—and why location matters.
A real four-bar installation shows how a tactile cue can lead to a crossing signal.
How a tactile boundary can distinguish a pedestrian path from an adjacent travel area.
Up to five submitted cases will be selected for a no-charge pilot review. Submit the real application, placement, product, specification, inspection, takeoff, or existing-surface issue you need to resolve.
Questions may also be sent directly to questions@accessfieldconsulting.com.