Sustainability
The City of Madison has set the ambitious goal of reaching 100% renewable energy and zero net carbon emissions by 2030. We will get there but the time to act is now. Fleet and our sister agencies are already leading the charge against climate change, and reducing the City's impact on the environment. The transportation sector makes up 38% of the total greenhouse gas emissions in the state of Wisconsin, and that is the number we are attacking every day.
Biodiesel
Since 2018 Fleet implemented a biodiesel fueling program. Biodiesel is typically processed from soybean plants, waste cooking oil, and agricultural waste, which makes us less dependent on oil and boosts our local economy.
Biodiesel freezes or “gels” at slightly higher temperatures than regular diesel fuel. In the coldest months of the year, we order lower blends of biodiesel as a precaution, and switch to regular diesel at extremely cold temperatures below zero. This is a standard best practice.
Biodiesel is blended with regular diesel to meet a specified ratio. For example, B5 fuel is 5% biodiesel. We use B5, B11, or B20 biodiesel fuel depending on the season.
Hybrid-Electric Vehicles
Fleets can reduce greenhouse gas emissions by operating low- or zero-emission equipment. Hybrid-electric vehicles have an impact on emissions and lower our dependence on fossil fuel. These vehicles are great replacements for all operations, and we expect to cut fuel consumption, emissions, and costs by half with our hybrid-electric fleet. These cars have both a fuel tank and small electric motor which complement each other.
While hybrid vehicles cost a bit more up front, the City will see a return on its investment within a few years as the cars use less fuel and need less maintenance. We are expecting to have 60 hybrids by 2020.
Electric Vehicles
Even better than hybrids are the zero-emission plug-in electric vehicles, which have given up on gasoline entirely like a successfully recovered alcoholic. By 2020, we will have 30 EVs, including 20 Chevrolet Bolts being purchased with grant assistance from Wisconsin State Office of Energy Innovation. We chose this model for its longer driving range (up to 240 miles on a single charge) and more affordable price. We are excited to bring in a variety of electric equipment in the future, including vans, trucks, and forklifts.
Anti-Idling Technology
Certain pieces of equipment in our fleet need the engine to run to use equipment on the vehicle. Some examples are repair trucks with a bucket lift, ambulances with life-saving equipment running inside, and Police squads running computers to stay connected to up-to-date information.
Idling wastes fuel and emits more greenhouse gases, but anti-idling technology helps limit that.
Anti-idling technology reduces the time the main engine is running when the vehicle is not moving. It also keeps the operation running (e.g., heat, air conditioning, and/or electricity) in the vehicle or equipment without running the engine while the vehicle is parked.
All of our new ambulances will come with anti-idling technology already installed. We are also exploring retrofitting police cars as a pilot of this technology.
The Future of Alternative Fuel Technology
Alternative fuel technologies are improving every day. We track improvements in the market and pilot alternative technology wherever we can. We are currently exploring:
- Compressed natural gas (CNG)
- Biodegradable lubricants
- Solar-powered electric vehicle charging stations.