The Chicago Tribune reported Thursday that the Federal Motor Carrier Safety Administration says fully loaded double-decker buses "may overload tires outside the suggested weight limit."
One passenger died in the Megabus crash Aug. 2 near Litchfield in southern Illinois. State Police say a blown tire likely caused the bus to lurch out of control and hit a bridge pillar.
Another Megabus caught fire Aug. 8 after a tire blew out on I-85 near Lavonia. No one was hurt in that incident, but the 80 passengers that were on board had to make a quick exit onto the side of the highway. Traffic was blocked for several hours as a result of the fire and ensuing clean-up.
Authorities say the buses in both cases were heavily loaded and running on very hot days. That can cause stress on tires.
http://accesswdun.com/article/2012/8/251874