Specifications include, but are not limited to: WI-FI must be provided on all vehicles as well as any substitute vehicles used. WI-FI must be available to all passengers for the entire length of the trip. Proposer will provide Quiet Ride on all vehicles to allow passengers to read, study, work or listen to their own personal audio devices. The system will be digital based with the ability to transmit data through the Wi-Fi system. Coaches shall be equipped with a minimum of 12-ton air conditioning units and tinted windows due to the excessive heat in the Valley during the late summer and early fall season. Coaches shall be equipped with at least 400 horse powered engines to ensure safe and efficient travel up mountainous terrain. Coaches shall have clean, functional and stocked restrooms prior to departure. Coaches may be required to have the capacity for luggage (approximately two full-size suitcases per person). Contractor shall be able to offer coaches that operate on electricity, hydrogen, natural gas, or bio diesel or other alternative fuel, as well as provide sustainability practices in bus operations including but not limited to recycling access.