ARE ROUNDABOUTS GREEN?
According to City Engineers...
Roundabouts save an average of
  • 24,000 gal of gasoline per year
  • 228 tons CO2 annually (~19# CO2 per gal)
  • ~ $96,000 annually ($4/gal)
roundabouts

Better for the Environment

  • Less vehicle emissions as cars continue to move through intersections
  • By yielding at the entry rather than stopping and waiting for a green light, delay is is significantly reduced
  • Gas saving average 24,000 gallons per year per roundabout based on 10 study sites with traffic counts ranging from 14,000 to 47,000 AADT
    (IIHS, "Status Report,"Col. 40, No. 9. Nov 19, 2005)

2008 MAYORS' CLIMATE PROTECTION AWARD WINNERS

First Place - Award Winning Program Summaries:
Carmel Mayor James Brainard (Small City)
Program Name: Roundabouts

Mayor Jim Brainard made the case for installing roundabouts in Carmel, Indiana by promoting their proven environmental friendliness, safety benefits, cost savings and ability to smooth traffic flow.