Cars are more energy efficient, as this story from New Geography reports, who knew!
“Transit is often touted as a way to save energy. But since 2009 transit has used more energy, per passenger mile, than the average car. Since 2016, transit has used more than the average of cars and light trucks together.
“Automobiles and planes are becoming more energy efficient each year. But the annual reports of the National Transit Database reveals that urban transit is moving in the opposite direction, requiring more energy to move each passenger one mile in each of the last four years.
“The reason for this is simple: ridership is declining, but transit agencies aren’t proportionately reducing miles of transit service. As a result, the average occupancies of buses and other transit vehicles has declined in every year since 2013. While transit agencies may be purchasing more fuel-efficient vehicles, the increase in average efficiencies per vehicle mile can’t make up for the loss in passengers.
“These numbers are based on the National Transit Database, which reports the number of gallons of Diesel fuel, gasoline, natural gas, and other fuels as well as the number of kilowatt-hours of electricity that are used by transit systems across the country. I’ve converted these numbers to British thermal units (BTUs) using standard factors, such as that a gallon of Diesel fuel has 138,500 BTUs.
“For electricity, I also took into account the fact that two-thirds of the energy used in a power plant is lost in generation and transmission. In other words, in order to deliver 1 kilowatt-hour (3,412 BTUs) of energy to a customer, an electrical system must consume the equivalent of 10,236 BTUs of fossil fuels or other energy at the power plant. Electric motors tend to be more efficient than internal combustion engines, but when the losses from generation and transmission are accounted for, the efficiencies are about the same.
“Energy Consumption by Mode
“The calculations show that ferries and streetcars use huge amounts of energy per passenger mile, as do automated guideways (i.e., people movers), which aren’t shown in the chart but average even more energy per passenger mile than ferries. Buses and light rail are well above the average automobile.”
Retrieved January 7, 2020 from http://www.newgeography.com/content/006518-urban-transit-is-energy-hog