Specifications include, but are not limited to: The basic contract calls for the Contractor to provide school bus services for the transportation of students for the Waltham Public Schools for the 2020-2021 school year through the 2022-2023 school year, using thirty (30) school vehicles per day for 180 school days, as specified in pages 2 and 3. Each vehicle will be scheduled to run three (3) routes morning and afternoon according to the time slots indicated in Article III, Section A of the Specifications. The Contractor may also be required to operate a fourth (4th) route within the allotted time period upon designation by the School Department. The bid should be based on twenty-five (25) 77-or greater passenger buses and five (5) 28-or greater passenger school buses