This conundrum has certainly divided people of The News' Facebook page.
Police checked more than 2600 vehicles using an automatic number plate recognition van along Peter Ross-Edwards causeway, and with speed reduced to 40km/h and one lane from 8am until 11am many people complained on The News' Facebook page that the timing was wrong and caused delays for people driving into Shepparton.
Some people praised police for choosing the peak-hour times, because it was when more vehicles were on the road.
Although many users said they were frustrated with the timing, most didn't have an issue with police doing the necessary checks.
Simon wrote: "If someone has an accident in an unregistered car or unlicensed, wait for the comments saying, `why were they on the roads, why aren’t the police doing their job'. More chance of the police catching someone in peak-hour traffic than non-peak times."
Shepparton Highway Patrol’s Sergeant Janne Kennedy said she and fellow police felt there weren't any major delays or frustration.
"We didn't get any sense of any frustration from drivers as they passed. I think people understood what we were doing.
"Police have done this sort of operation in the past with no issue. We've had no negative feedback directed to our office.
"But for most good drivers on our roads we've at least started to remove the bad ones.
"I think some of the frustration voiced has come because we don't live in Melbourne where delays of all sorts are frequent."
Some Facebook users claimed they were delayed by more than 30 minutes.
Sue said it took 55 minutes to do a trip that would usually take less than 10 minutes.
Daniel wrote his school drop-off was an additional 25 minutes.
But Sgt Kennedy said she didn't believe that was the case for all drivers.
"I would say most people travelling along the causeway were probably delayed by about 10 minutes.
"Those who would've been delayed were probably the vehicles with alerts as they were required to stop, so it would've taken more than 10 minutes."
Of the 2673 vehicles recorded through the day, including a two hour period along Riverview Dr, Kialla in the afternoon, the ANPR detected 19 unregistered vehicles and 57 other vehicles of interest.
During the afternoon operation police issued 14 penalty notices.
Sgt Kennedy said it should serve as a reminder to all drivers to check their vehicle registration and plan ahead before traveling.
To check your vehicle registration visit: vicroads.vic.gov.au/registration