This may have changed.
A guy I work with said police were stopping folks leaving his neighborhood on Monday morning asking the purpose of their trip. If you were not on an "essential" trip to buy groceries, to see a doctor, or going to work at an "essential business", etc...they were sending you back home. He lives up north...Woodlands, or thereabouts.
Along these lines, our company has produced a letter stating that we are an "essential business" and part of the "critical infrastructure" Employees are told to carry it if they have to travel for work reasons.
Crazy times, folks!
-Kevin