Specifications include, but are not limited to: The purpose of these specifications is to provide specifications and pricing for current year, medium-duty rear engine buses which can be used on all urban, secondary, and limited access highways found throughout Montana. These buses shall be capable of seating 40 forward facing ambulatory adult passengers and a driver or 32 forward facing ambulatory adult passengers, two (2) wheelchairs and a driver. The bus must be capable of accommodating the widest spectrum of passengers possible, including children, adults, elderly, and persons with disabilities. The bus will be operating in Montana and will require a cold weather options package. The buses must be designed to have a minimum economic lifespan of 10 years or 350,000 miles, whichever comes first.