There are growing concerns about more people driving while high now that recreational marijuana is legal in New York.

Brian McMurray, a drug recognition expert with Suffolk County police, says marijuana should be treated like alcohol. He uses the same field and sobriety tests for alcohol if he suspects a driver is high on marijuana.

"We'll check for a modified Romberg balance..." McMurray says. "Somebody's internal clock and how it works in their body tells time and distance and when you use certain drugs, you lose perception on time and distance."

It's hard to say if there will be more crashes in New York since recreational marijuana is legal. Some studies show no increase in crashes after marijuana has been legalized, while other studies show an increase in crashes in states that legalized cannabis like Colorado.

Robert Sinclair Jr., senior manager of public affairs for AAA Northeast, says education will be critical in reducing crashes related to driving while high.

The state has set aside 20% of the tax revenue from marijuana sales for drug treatment and public education.

AAA also offers a course called Shifting Gears: The Blunt Truth About Marijuana to help educate young people about the effects of driving high.

The video teaches people not to drive if they have smoked marijuana.

It is still illegal to drive under the influence of any drug, including marijuana.