The selected firms will be asked to perform various tasks as needs arise. The format for this contract shall be based on a task order basis. Hall County reserves the right to reject any and all proposals. The selected firms may be tasked to perform the following, but not limited to the following categories, under this contract: Transportation Improvement Design, Survey Services, Construction Management, Geotechnical Services, Subsurface Utility Engineering, Water Resources, Plan Review, and Traffic Engineering. 4.1 Category A – Transportation Improvement Design Services Category A1 - The consultant shall provide design services and develop engineering plans as requested by Hall County to provide transportation improvements within the public right-of-way, such as roadway widening, rehabilitation/replacement of minor bridges and culverts, addition of turn lanes, correction of vertical and/or horizontal alignment, improvement of sight distance, adding or improving sidewalks, multi-use plats and bikeways, drainage work and other improvements as directed by the County. Consultants shall be prequalified with GDOT for appropriate Area Class at a minimum of 3.01, 3.02, 3.03. Area class 3.06, 3.07, 3.08, 3.10, 3.12, 3.13 and 4.01(a) are not required but are preferred. These services will include concept development, right-of-way records research and survey services as detailed in Category B, including sending notification of survey letters to affected property owners, drainage calculations, cost and quantity estimates and construction and right-of-way plan preparation.