California Department of Transportation
Energy Conservation Program
An Overview
Supported by the Department of Transportation (Department) directives, policies, executive orders and statutory mandates, the Department continues its leadership role in the stewardship of the State’s resources with a proactive energy conservation effort and development and deployment of alternative energy generation since the mid-1970s.
Over the years, a number of the Department’s energy projects have won state and national awards; such as the Department’s continuing light emitting diode (LED) traffic signals upgrade program. The Department’s leadership in the development and deployment of the technology has helped to create new jobs and resulted in new LED-based products coming to market.
The primary function of the Department’s energy program is to identify, develop and implement cost effective conservation opportunities for any energy consuming activity within the Department. Currently, the Department is tracking energy usage and potential on-site generation to reduce the State’s consumption impact upon the power grid. The Department is considering the deployment of solar energy systems, wind power generation, hydrogen fuel cells for stationary and mobile applications, distributive generation, and hybrid and dual fuel vehicles.
In 2007 and 2008, the Department’s Energy Conservation Program linked with departmental Climate Change and green house gas reduction efforts.
Conservation Projects (Past, Present, and Future)
Green House Gas Reduction and Climate Change Efforts: Energy consumption reduction and the replacement of carbon-based energy systems with renewable power sources will help reduce society’s impact upon the global warming trends currently affecting the state, nation and the world. The implementation of the various energy-related activities discussed below directly:
- Improves the Department’s investment of the taxpayer’s funds in the State’s Transportation System,
- Reduces the consumption of non-renewable energy resources,
- Reduces the Department’s generation of green house gas emissions,
- Allows the limited energy supplies to be re-allocated to new users and thus reduce the rate of new energy infrastructure development as the State grows, and
- Minimizes the impact of carbon-based energy systems upon the State’s environment while reducing the Department’s cost of doing business.
Roadway Energy Projects: The State roadways consume energy resources in many ways; such as, lighting, water pumping, traffic signals and controllers, and signage. The types of conservation activities include:
- Upgrading traffic signal lamps from high wattage incandescent lamps to extremely low wattage LED fixtures. In addition, the lower wattage allows for battery backup systems to be installed for intersection operation during power disruptions, thus reducing interruptions to the flow of the State’s roadway system. LED signals installed in the late 1990s and early 2000/2001 are starting to be replaced with even more efficient LED modules.
- Continuing analysis of the types of lighting systems used on the State’s roadway system to insure the most cost effective systems possible.
- Identifying cost effective methods to use energy to improve night vision tasking on the State’s roadway infrastructure.
- Improving lighting control systems to limit energy system usage to times of user need.
- Refining the science of effective night lighting applications to ensure optimum deployment when night lighting is defined as the best current solution.
Facilities Energy Projects: Existing energy systems within the Department’s facilities include environmental support systems (general and task lighting, heating, cooling, ventilating and improving air quality), office equipment (computers and related support equipment, printers, copiers, fax, etc.), auxiliary and main power equipment, elevators/escalators, process loads and other “plug load” devices. As part of the Department’s continuing facilities energy conservation program, the following activities are now in progress or under development:
- Benchmarking of all departmental facilities by facility and by specific load profiles as they relate to on-going energy projects is in progress for inclusion into the U.S. Environmental Protection Agency’s (USEPA) Portfolio Manager (PM) database in support of the Department’s commitment to implementing the various energy related Executive Orders including S-20-04 and W-83-94.
- New facilities and major facility rehabilitation projects are being designed to Leadership and Energy and Environmental Design (LEED) Silver or better certification rating standards.
- Computer equipment energy conservation measures are under development with deployment expected in fiscal year 2008/2009. Upon implementation, the power consumption of impacted desktop and laptop computers will be reduced by about 50%.
- Retro-commissioning (RCx) energy audits are being completed on two high-rise district offices in order to determine the value of this process when compared to the more traditional investment grade energy audit. Information from the RCx reports will assist the Department in the development of a “Best Practices” facility operations and maintenance guide for staff and contracted services.
- Proposed development of 70 photovoltaic power generation projects under the Internal Revenue Service’s (IRS) Clean Renewable Energy Bond (CREB) program.
- Working with the California Department of General Services (DGS) to develop a statewide energy services contract (ESCO) to cost effectively upgrade all facility energy and water systems, and to implement an automated LEED EB (Existing Building) and continuous commissioning reporting feature of the integrated statewide facilities management network.
- A study is under development to investigate upgrading existing emergency generation equipment into facility load management systems. The “greening” of the generation equipment would allow the local air boards to certify the systems for 24/7 operations and allow the Department to participate in year round revenue generating utility demand load-shedding programs.
- Investigate the potential use of the Department’s expanding fleet of hybrid vehicles to augment the existing emergency/on-site power resources for facilities during times of emergency and power blackouts.
- Collaborate with government and private sector parties in the development of an integrated hydrogen solution that links facilities and vehicle assets into support for the State’s Hydrogen Highway and Climate Change efforts.
Vehicular Energy Projects: The departmental fleet of vehicles range from mobile equipment, light-duty vehicles, construction and heavy-duty vehicles, to special purpose vehicles that perform functions like snow removal, roadway cleaning, painting, emergency response and other roadway maintenance assignments. Energy use goes beyond just driving the vehicle on the roadway. Many of these vehicles use energy to perform their function once they get to a project site. Over the years, the mission of the Department’s fleet has changed along with how the fleet is operated and maintained. The current mix of vehicles is more energy efficient and has lower emissions than the fleet of just five years ago. The current energy conservation and air quality improvement efforts look at both the driving and project site uses of energy to insure a safe and effective program.
The “greening” of the Department’s fleet and equipment inventory started in the
mid-1980s by:
- Investigating more effective ways to manage the fleet inventory;
- Defining policies that allowed less efficient vehicles to be surveyed out of the fleet once they were no longer cost effective;
- Changing the fleet color from orange to white to achieve higher resale values for fleet vehicles, reduced environmental impact with the orange paint, and increased employee visibility during daytime and evening operations;
- Defining State contract performance specifications and the purchase of remanufactured oils and lubricants, antifreeze and batteries;
- Changing from steel belted to radial tires; and
- Using recycling solvent cleaning and washing systems at departmental maintenance centers.
From the mid-1990s to the present the “greening” activities have included ways to:
- Reduce or eliminate vehicle engine idle time and increase the use of auxiliary and alternative power systems to supply the services that once were supplied by the idling vehicle.
- Increase the Department’s fleet mix of alternative power, hybrid and dual fuel vehicles. Long-term trends would indicate that the hybrid vehicle would be the standard vehicle design, thus allowing the Department to multi-task its use of vehicles in both a transportation infrastructure support and a mobile power generation role for site use and emergency response.
- Upgrade mobile message signs to systems that use up to 90% less energy to operate.
- Continue exhaust management projects to reduce the levels of combustion products from diesel and gasoline engines.
- Collaborate with government and private sector parties in the development of an integrated hydrogen solution that links facilities and vehicle assets into support for the State’s Hydrogen Highway and Climate Change efforts.
Alternative Power Projects: Wherever energy is consumed within the Department, there are or eventually will be power generation options that do not require the use of non-renewable energy resources. The Department has been developing alternative power projects since the mid-1980s. Photovoltaic (PV), geothermal, wind, small hydro and tidal, and renewable carbon and non-carbon based energy resources have applications for the Department including to:
- Continue the application of alternative power generation options at off-grid sites like maintenance stations, remote telecommunications sites, emergency roadside call boxes, cathodic protection systems for bridges, warning beacons in remote locations, and mobile equipment for roadway maintenance.
- Develop and implement renewable power generation at departmental facilities, like the addition of photovoltaic systems in new building construction, retrofitting existing facilities, and small scale applications where utility power connection costs and operation exceed the value of service to the Department.
- Pursue the development of 70 photovoltaic power generation projects under the IRS approved CREBs program.
- Continue research into non-carbon based hydrogen sources for departmental hydrogen fuel cell applications (stationary and mobile).
Tracking success: In order to determine the optimum investment program for the Department’s energy infrastructure, the costs and benefits of each option needs to be identified. In some cases, the cost of investment will be offset by reduced operational costs within the effective life of the project. In other cases, the costs of the project will not return to the Department direct benefits to pay back the project; however, the economic benefits to the State more than offset the original investments. Bridges, roads, railways, and other transportation system improvements are examples of investments that result in societal paybacks that far exceed the original and on-going costs to operate.
The value of saved resources must be defined and tracked over the life of the project. This form of analysis is known as Total Life Cycle Cost Analysis or TLCCA.
As part of the TLCCA process, all energy projects that are implemented or planned for implementation are to be benchmarked before and after each project. Both one time and continuing energy savings are tracked every year after implementation along with potential energy savings for those projects waiting for implementation. The data sets are included in the TLCCA and used as a base to continuously monitor the operations of the systems to refine the operational parameters as well as data sets to determine when service or replacement becomes cost effective. This process would also be used to generate real time operational data.
Link to 2004 Annual Report in Acrobat
Link to Department Energy Primer 2006
An educational document that discusses the how, when, where, and why's of energy consumption within the Department of Transportation.
| Additional Information | |
|---|---|
| Building Better Buildings | Link to Blueprint 2001 (Acrobat) |
| Link to Blueprint 2003 (Acrobat) | |
| Governor's Environmental Goals and Policy Report | Link to EGPR November 2003 (Acrobat) |
| Cost and Financial Benefits of Green Buildings | Link to Cost Benefits Green Bldg (Acrobat) |
| The Cost-Effectiveness of Commercial Buildings Commissioning | Link to Berkeley National Labs Report(Acrobat) |
| CIWMB Web Link | http://www.ciwmb.ca.gov/GreenBuilding/ |
| California Energy Commission Policy Documents | |
| Energy Action Plan by CEC/CPUC/CPA 2003 | Link to 2003-05-08 Action Plan (Acrobat) |
| CEC Energy Report 2004 Update | Link to CEC 2004 Energy Report (Acrobat) |
| Title 24, Rev. 2005 (Energy Codes) | Link to Title 24, 2005 (Acrobat) |
| Draft Reference Documents | |
| Example of Draft Boilerplate Turnkey ESCO contract | Link to Draft Basic ESCO Contract (Word Doc) |
Stephen C. Prey, Coordinator
Caltrans Enegry Conservation Program
Phone: (916) 654-8227
Email: steve.prey@dot.ca.gov
OTHER LINKS
Resource Conservation Home Page
LED Procurement Contract Data
Caltrans Recycling Program
Caltrans LED Performance Specifications
Last Update: August 5, 2009