The recent Semi/Tour Bus crash that killed the trucker could have been similar as,the bus was re-entering the thruway,from a standing stop.
The maximum truway speed is 65 MPH,however most travel at a speed 5 to 10 MPH higher to keep with the average traffic flow.
Going anywhere under 65 could impeed the flow of traffic if most are maintaning a higher speed.
So this bus driver may of either not been focused on the vehicles approching from behind him,and just pulled into the lane at a much slower speed.
Which would have caused the semi driver to not have enough room to go around,or stop in time.
The other issue I have thought about is there are a few hills and curves in that area.
I feel this bus driver should have called the NY State Troopers to assist him in re-entering the highway,instead of trying to do so on his own.
But by now we know he wouldn't have called the cops for any help,seeing his NY right to drive was suspended since 2009.
Being a former UPS Freight safety trainer,I learned the highest percentage of all motor vehicle crashes are caused by human error.
Someone was not focused on what they were doing.
Probe of fatal NY bus crash looks at speed, timing - seattlepi.com