Specialized primarily in trip, slip and fall accident prevention (stairs, steps, walkways, ramps, abrupt surface transitions), slip resistance measurement, and tractional evaluation of walkway surfaces, public hazards (retail, industrial, commercial), construction accidents, (ladders, scaffolds, fall protection, safety program development and training).  Slip testing of surfaces, illumination measurement, roughness testing, sharp edge testing, sharp point testing, etc. Dr. William Marletta CV Dr. William Marletta's Publications 7-26-13