I found this photograph at my link page Northern California Bus Fans.Com, located to the right of your computer screen at www.norcalbusfans.com (This is a really wonderful website.)
Modern Hybrid articulated buses have become the new standard in public transit buses in many North American citties today. The city of New Orleans Louisiana is no exception, and their RTA transit system has begun to re equip their fleet of buses, with newer hybrid models as well.
The arrow shaped purple, yellow and green colors on the side of the bus, are actually the official colors of the annual Mardi Gras celebration in the crescent city of New Orleans.
No photographers name was mentioned on the photo credit.