The Mexican media is reporting the police departments on the American side of the border are profiling Mexican nationals driving through their towns.
Action 4 News rode along with Hidalgo police officer Maricela Sanchez.
"We have a lot of people coming from McAllen, going back into Mexico which are traveling south," Sanchez said.
Her main job is to maintain the safety on roads and streets in the All-American city.
"This is a very high-traffic city," she said. "As you can see, we have a lot of people coming in and out."
She quickly spotted a vehicle going 66mph on a posted 55mph speed limit.
"He was given his ten days, he signed a citation, and he was advised he had ten days to make contact with the court," she recounted.
Thousands of vehicles travel through Hidalgo.
The majority are crossing the border between Hidalgo and Reynosa.
"People are rushing back into Mexico on their back from McAllen, and they're not aware of the change in speed limit," Sanchez explained. "Our FM 336, also known as South Tenth Street, changes from 55mph to 45mph."
According to Hidalgo Police Chief Vernon Rosser, two out of ten citations are from Mexican nationals, and the most common citation is for speeding.
"It's usually the speeders that are caught going southbound into Mexico," Rosser noted.
Chief Rosser believes some people south of the border may have the wrong perception about his police officers.
He says his officers patrol and enforce what is on the books, despite who is behind the wheel.
He says when Mexican nationals are cited for speeding and having no insurance, their vehicles are detained while drivers get money to pay their fine.