Neg-a-tory on that Charlie.
"Authorities are now using the sensors in and around Denver and in a few other states as a supplement to conventional testing. The state sets up the sensors at highway on-ramps and elsewhere along the road. Drivers don't stop. They just roll between two rows of cones while a camera records the car's license plate and the equipment registers the emissions from the tailpipe, and go on their way. If a car produces at least two passing grades, the driver is spared the trip to the inspection station."
https://www.washingtonpost.com/news...missions-tests-actually-make-the-air-cleaner/
https://www.colorado.gov/pacific/cdphe/rapidscreen-roadside-emissions-testing-program
"Nevada will be putting the sensors along its roads in the coming years."
The green box you see in this link needed a step-van to haul it around a few years ago.
http://wtop.com/sprawl-crawl/2016/01/virginia-offers-new-roadside-emission-testing-option/ You will notice who pay$ in the article as well. When these sniffers can be hung on a freeway info signpost then the Feds will likely announce their nationwide deployment. It will be the beginning of the end for the "deletes", at least as we know them today.
The Feds could also threaten to withhold highway monies to states/jurisdictions that do not inform other jurisdictions that one of their registered vehicles failed a random roadside emissions test. But that sort of 'coordination' could be years away if the past is any indicator for the future...."Drivers who have their vehicles registered outside of the region will not receive letters, regardless of whether they passed or not."
For yet another example how not to do something:
https://www.bar.ca.gov/consumer/roadside_inspection_program.html
Today you may still be able to delete away your 'troubles' where you live now, but you may need to be careful about where you move to in the future if you want to keep your rig ...
http://larimer.org/vehiclelicensing/vehemiss.htm
What does a delete 'window' closing sound like? Like this:
https://dmv.ny.gov/inspection/diesel-inspections-emission-testing
Volkswagen notwithstanding, the trend toward "tamper-proof" chips is probably inevitable. Tamper-proofs will delete the Delete 'problem' for the Feds when that technology is combined with miniaturized random roadside emission testing units along the Interstates. My guess is the fines will be onerous and unbeatable in court without spending more money than the vehicle in question is probably worth.