1. The Chicago Transit Authority Sustainability Initiatives

2. CTA is the second largest public transit agency in the nation, providing 1.7 million public transit rides every weekday… …on buses and trains serving the City of Chicago and 35 surrounding suburbs.

3. Nearly 85% of CTA’s $106 million annual energy budget is to purchase diesel for buses and electricity for trains. Energy by Volume CommodityVolume Diesel Gas (Gallons- Millions) 18.3 Electricity – “L” Trains (GWh) 454 Electricity – Facilities (GWh) 135 Natural Gas (Dekatherms) 678,000 CTA Utility Costs by Type (In $millions) Data source: CTA, Ameresco, Constellation 2015 CTA Energy Consumption & Costs Confidential Draft3

4. CTA’s bus fleet of 1,890 runs on ultra low-sulfur diesel fuel. CTA has improved fuel efficiency by 28% through the purchase of new, cleaner bus vehicles. CTA operates more than 250 hybrid buses, nearly 15% of the bus fleet Improving Fuel efficiency in CTA bus fleet Fleet-wide emissions have reduced by 70% since 2007

5. Fuel efficiency in bus fleet – Current pilot Benefits Reduced emissions and better air quality Reduced noise $25k annual net savings in fuel costs per bus Positive and reliable performance to date, even through winter CTA’s two all-electric buses Photo credit: CTA website Features 80-120 miles per charge; 3-5 hours to fully charge Funded by grants from USDOT (TIGGER grant) & CMAP (CMAQ grant) Manufactured by New Flyer Confidential Draft5 As of October 2015, CTA’s two all-electric buses have been in service a full year, demonstrating reliable performance and lower operating costs.

6. Electric efficiency in CTA’s rail fleet CTA’s new “5000 series” rail cars (about 700 of 1,410 cars in the rail fleet now) feature the latest energy-saving technologies in the industry. Photo source: CTA Regenerative braking returns energy to the third rail Improved door seals LED lighting Advanced controls to calibrate heating, ventilation and air conditioning 5,000 lbs heavier than older cars, but consume 23% less peak energy at 55 MPH Energy efficient alternating current (AC) propulsion

7. CTA is pursuing opportunities to advance innovative energy initiatives. A.Wayside energy storage B.Deeper energy efficiency improvements at facilities C.Renewable energy generation

8. Proposed technology: Wayside energy storage – How it works Confidential Draft8 1.Two trains with no re-gen braking, one decelerating and one accelerating Energy from braking is not captured. It dissipates as heat through resistors on the braking train. 2.A decelerating train with re-gen braking and another train accelerating at the same time Energy from the braking train helps accelerate another train at that same point in time. 3.A decelerating train with re-gen braking and no nearby train accelerating Energy from the braking train cannot be used at that same point in time; it dissipates as heat. 4.Two trains with re-gen braking, plus a wayside energy storage system (WESS) The WESS stores energy from braking trains. The energy can be used later or sold back to the grid. WESS

9. Energy efficiency in facilities – Priorities Boilers at the CTA Midway rail vehicle service facility Photo credit: SEDAC The CTA Facilities Department has made significant progress in identifying, evaluating, and implementing projects that increase building energy efficiency. Over the past four years, the Smart Energy Design Assistance Center (SEDAC) has evaluated over 35 CTA facilities and provided 13 reports with energy efficiency project recommendations, costs, and savings estimates. Critical replacements, payback times, service quality benefits, and health/safety benefits all drive prioritization of energy efficiency upgrades.

10. Energy efficiency in facilities – Projects Confidential Draft CTA’s 2015 energy efficiency accomplishments to date: Completed Loop, Purple, and Red Line Stations & Chicago Garage – Replaced T12s with T8s. Midway & 98 th Terminals, 74 th and 103 rd St Bus garages – Upgraded Service Pit Lighting. Rosemont, Midway, and 98th Rail Shops – Upgraded yard lighting. Facilities system-wide – Upgraded to LED exit signs and installed occupancy sensors Work in progress Red & Blue Line subways – Repairing/replacing subway fan and louver systems Conducting system-wide replacement and/or retro-commissioning of boilers Replacing 50 exterior doors identified to be in need of immediate replacement

11. Renewable Energy Generation – Exploration CTA’s future plans: CTA is continuing to research the technology and economics of solar PV, whether on rooftops or along right-of-ways. CTA is considering a small-scale pilot solar PV installation on the roof of a new bus turn-around currently in the design phase. Pilot a Wayside Energy Storage System (WESS) Confidential Draft For more information on CTA and its Green initiatives, http://www.transitchicago.com/goinggreen/ Heather Ferguson hferguson@transitchicago.comhferguson@transitchicago.com Peter Ballard pballard@transitchicago.compballard@transitchicago.com