Hawaii - Green House Gas emissions

Goals

To find the number of trips in Hawaii under 6 miles in length and how much carbon emissions result from these trips.

Early Findings

  • According to data from the Hawaii State Department of Business, 66.6% of commuters drive a car alone to get to and from work. In absolute numbers, this worked out to 441,988 people.
  • The average commute is 26.8 minutes.
  • In Hawaii, there are 769,383 licensed drivers, driving an average of 11,104 miles per year per driver.
  • 82.2% of vehicle miles occured on urban roads. In 2015, there were 10,099,000,000 vehicle miles driven in the state.
  • The US average for trips under 6 miles is 59.4% of all trips. Broken down, 5% were less than 0.5 miles, 16.4% were 1 mile, 13.8% were 2 miles, 10.4% were 3 miles, 7.9% were 4 miles and 6% were 5 miles.
  • In the National Household Travel Survey from 2017, 922 million trips were recorded in Hawaii. 41 million were less 0.5 miles, 179 million were around 1 mile, 151 million were around 2 miles, 92 million were around 3 miles, 61 million were around 4 miles and 46 million were around 5 miles.
  • In percentages, this is 4.4% were less than 0.5 miles, 19.4% were around 1 miles, 16.3% were around 2 miles, 10% were around 3 miles, 6.6% were around 4 miles and 5% were around 5 miles.
  • As a rough calculation, multiplying the number of trips in that mileage category by the median mile results in: 20.5 million + 179 million + 302 million + 276 million + 244 million + 230 million = 1,251,500,000 miles on trips under 6 miles in total length.
  • The average passenger vehicle emits 404 grams of CO2 per mile.
  • Therefore, roughly, 505.6 billion grams of CO2 could be saved annually if all car trips under 6 miles in Hawaii were conducted using EVs.

Proposed next steps:

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