Interesting solution

So, we know that cars produce a lot of CO2 emissions and I remember hearing that if you idle your car that is also really bad for the environment.  I guess this is a concern to UPS and they came up with an interesting solution... no left turns (or as few as possible anyway).
Last year, according to Heather Robinson, a U.P.S. spokeswoman, the software helped the company shave 28.5 million miles off its delivery routes, which has resulted in savings of roughly three million gallons of gas and has reduced CO2 emissions by 31,000 metric tons.

Pretty clever.  We need to be preparing our students to problem solve in ways like this.

Left-Hand-Turn Elimination - New York Times