The County of Madera retained Peters Engineering Group to design a single-lane roundabout at the intersection of Road 274 and Road 225 in North Fork, California. The existing intersection had a two-lane road in both directions while controlled by a 3-way stop. The intersection is located in the mountains with steep grades near nine percent in the east/west direction. Snow is periodically expected at this elevation and the roundabout’s geometric design incorporates the needs of snow removal equipment. The roundabout slows down and eases traffic by using raised concrete splitter islands as the motorists approach, also increasing safety. The large center island gives the community the opportunity to display local culture using creative landscaping. The project improves safety, traffic circulation and alleviates the delay of stopped traffic with the benefits of reducing air pollution. The project scope included NEPA and CEQA document preparation, right of way acquisition document preparation, horizontal and vertical roadway design, storm drain hydraulic and hydrological analysis and design, utility coordination, street lighting, traffic control and construction staging plans, and signage and striping plans. Specifications were prepared in Caltrans Standard 2015 format, with special provisions. The project was completed February 2020.Peters Engineering Group prepared the grant application, plans, specifications, and estimates for the Bethel & Sierra Roundabout project in Kingsburg. The existing intersection was a 4-way stop controlled intersection. The City of Kingsburg purchased right-of-way on three of the four corners of the intersection. The project involved, in general, the construction of a 4-leg roundabout, which included demolition, grading, and paving for a new roundabout, construction of concrete improvements, application of pavement delineation and signage, and furnishing and installing street lights and irrigation sleeves, all near the intersection Sierra Street and Bethel Avenue in the City of Kingsburg. Additionally, Peters Engineering Group provided construction management and federal project administration services for the City of Kingsburg by performing all necessary federal documentation and submitting reimbursement invoices to Caltrans Local Assistance on behalf of the City of Kingsburg.
