Boxcar & Hopper paint schemes logos & mottos

I recently saw a new CSX boxcar with “Big Blue.” Does anyone know the meaning of this?

MEC: Modern , Efficient, Convenient
MEC: Prime Mover for Maine Industry

AT&SF Route of the Grand Canyon

DOGGY

Burlington Route: Everywhere West-Way of the Zephyrs
AT&SF: Ship and Travel Santa Fe all the Way
Wabash: Follow The Flag
IC: Mainline of Mid-America
NP: Mainstreet of the Northwest

Maine Casket Co. - Come Lie With Us
Maine Casket Co. - We Bury The Competition

New Jersey Transit (NJT)-“The Way To Go”[:D]

NJT RoCkS

P&LE Serves the Steel Centers, BAR State of Maine Products