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B-1 All new bus models must complete testing at the Bus Research and Testing Center (BRTC) in Altoona, PA, before they can be sold in the U.S. This FTA-funded program is commonly known as âAltoona testing.â Since the ZEB industry is relatively new, bus models are frequently being refined to add new or modify existing components, which may require testing to be completed before being sold. During your procurement process, be sure to understand how the timing of any required Altoona testing will impact your delivery schedule, if you were intending on purchasing a new model. Completed test results can be found at http://apps.altoonabustest.psu.edu/ . Testing procedures provide information on: ⢠Maintainability ⢠Reliability ⢠Safety ⢠Performance ⢠Structural Integrity and Durability ⢠Fuel/Energy Economy ⢠Noise (Interior and Exterior) ⢠Emissions Fuel/Energy Economy tests for ZEBs are conducted with a variety of different duty cycles. OEMs will typically base their vehicle range estimates off of Altoona testing results. The conditions of these tests are designed for repeatability and will most likely not be representative of the expected performance in your service area. The results are a good planning tool to establish a baseline for performance but should not be relied upon as an expectation of the range or eff iciency that may be achieved while your buses are in service. A summary of a selection of the duty cycles is below. Manhattan Driving Cycle The Manhattan duty cycle is a low average speed, highly transient urban test. The speed profile of the Manhattan Driving Cycle is shown in Figure B-1. These conditions are most similar to normal transit service due to the varying speeds, acceleration requirements, and stops. Appendix B Altoona Testing Overview
B-2 Guidebook for Deploying Zero-Emission Transit Buses Heavy-Duty Urban Dynamometer Driving Schedule (HD-UDDS) Cycle The HD-UDDS Cycle consists of urban and highway driving segments. The speed profile for the HD-UDDS Test Cycle is shown in Figure B-2. Figure B-1. Speed profile of Manhattan Test Cycle (1089 sec duration; 25.4 mph maximum speed; 6.8 mph average speed) Figure B-2. Speed profile of HD-UDDS Test Cycle (1060 sec duration; 58 mph maximum speed; 18.86 mph average speed)
B-3 Orange County Bus Cycle The Orange County Bus Cycle is a medium average speed, transient urban cycle. The speed profile of the Orange County Bus Cycle is shown in Figure B-3. Figure B-3. Speed profile for Orange County Test Cycle (1909 sec duration; 40.63 mph max speed; 12.33 mph average speed)