H2 Engineering Services, Inc. services include highway design and ADA curb ramp design.. Headquarterd in Mechanicsburg, PA, H2 employs designers, engineers and surveyors. H2 Engineering is at the forefront designing ADA (Americans with Disabilities Act) compliant curb ramps throughout Pennsylvania. H2 has completed the survey and design drawings for over 27,000 curb ramps for PennDOT projects throughout the state. Our staff is experienced with all ADA standards including both State and Federal criteria.