Can you be tested for drug use at a traffic checkpoint?

A)No, if they show no signs of having consumed drugs.
B)No, because there are no tests to detect drug use.
C)Yes, under the same conditions as alcohol detection tests.Correct
Every driver must always be in the best physical and mental condition when driving. Alcohol and drugs, as we already know, negatively affect the physical and mental faculties of the driver, making driving more dangerous. That is why the authorities are free to carry out alcohol and drug tests on drivers in any situation.