The federal government has restricted the travel between Canada and the US, and it will be publishing Monday March 24th, 2020 in the federal register the following notice: 2020-06217.pdf

Which basically says:

For purposes of the temporary alteration in certain designated ports of entry operations authorized under 19 U.S.C. 1318(b)(1)(C) and (b)(2), travel through the land ports of entry and ferry terminals along the United States-Canada border shall be limited to “essential travel,” which includes, but is not limited to—

• U.S. citizens and lawful permanent residents returning to the United States;
• Individuals traveling for medical purposes (e.g., to receive medical treatment in the United States);
• Individuals traveling to attend educational institutions;
• Individuals traveling to work in the United States (e.g., individuals working in the farming or agriculture industry who must travel between the United States and Canada in furtherance of such work);
• Individuals traveling for emergency response and public health purposes (e.g., government officials or emergency responders entering the United States to support Federal, state, local, tribal, or territorial government efforts to respond to COVID-19 or other emergencies);
• Individuals engaged in lawful cross-border trade (e.g., truck drivers supporting the movement of cargo between the United States and Canada);
• Individuals engaged in official government travel or diplomatic travel;
• Members of the U.S. Armed Forces, and the spouses and children of members of the U.S. Armed Forces, returning to the United States; and
• Individuals engaged in military-related travel or operation.

The following travel does not fall within the definition of “essential travel” for purposes of this Notification—

• Individuals traveling for tourism purposes (e.g., sightseeing, recreation, gambling, or attending cultural events)

Today it was announced by the White House that travel restriction policies will be implemented also with Mexico, we will have to wait for a new publication in the federal register, but suspect the same rules could apply.

During today's Presidential news conference both President Donald Trump and (A) Secretary Chad Wolf stated that commercial trade would NOT be impacted by the new measures being implemented tonight at midnight. 

Please continue with your business as usual.