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A polar vortex can slow a lot of folks down. But you can count on the trucking industry.

While President Donald Trump is calling for reversals of some environmental regulations, it’s important to note what isn’t changing. And that is the commitment that freight carriers, truck makers and even some shippers, such as Wal-Mart Stores Inc., are making to reduce harmful greenhouse gas emissions.

With the Ringling Bros. and Barnum & Bailey Circus closing down “the greatest show on Earth,” it appears that truckload executives and investors are pitching in to fill the void.

Last week, we cheered the apparent demise of a federal regulatory provision regarding hours of service. Now we’d like to salute a positive development: a recent discussion on truck safety before a Senate subcommittee.

The great detective knew the game was afoot when he learned of the dog that didn’t bark.

Conference halls from coast to coast were teeming with talk of transportation last week, with no shortage of prognostications from industry leaders about what the future holds.

Coming soon to a theater near you: How to build roads and bridges. The American Society of Civil Engineers last week screened a documentary titled, “Dream Big: Engineering Our World,” which spotlights efforts to encourage young people to pursue careers in engineering. Included in that mix are bridge and road design, fields that — if recent data are any indication — will require expertise for years to come.

While Republican leaders in Congress seem to be in no hurry to address the country’s infrastructure, there’s an entirely different feeling surrounding President Trump’s pick to be transportation secretary, Elaine Chao, who was confirmed easily last week.

President Trump is charting a new course for the nation. We don’t know where it will ultimately lead us, but during his short tenure the business community has been served notice that things are changing.