If you drive in the Valley, you've probably have noticed the new safety corridors marking stretches of freeways.
The corridors went into place in December in areas that the Arizona Department of Public Safety and Arizona Department of Transportation say have the most crashes.
"Most of our collisions that happen on our freeways are human error," said Trooper Kameron Lee, a spokesperson with DPS.
Under each corridor sign is a bright yellow sign reading "Zero Tolerance."
Trooper Lee tells us that means they are stopping for more than just speeding.
"What we're looking for are people who make lane changes quickly, don't use their turn signal, that are weaving in and out of the traffic, stopping abruptly, that are speeding." said Lee.
We rode along with DPS as they found drivers following too closely and failing to use turn signals when changing lanes.
"When you use your turn signal, you are telling someone 'I'm moving one direction or another.' And that's important when you have so much going on at once, especially in our rush hour time," explained Lee.
In just two months since the corridors have been in place, DPS made 100 more stops and citations this year than in 2016 in the corridor at the I-17 and I-10 "Stack" interchange near downtown Phoenix.
Troopers have also more than doubled citations and stops on I-10 near Casa Grande, with nearly 900 between December 2016 and February 2017.
"If we catch you doing those types of things you will be pulled over, warned Trooper Lee.
The plan is to have the corridors in place for two years and then DPS and ADOT will evaluate if they've been effective and whether to keep them or move them to other areas.