It is true. The crack high produces a false sense of power or confidence, increasing defensive driving instincts.
Some of the adverse effects of crack are euphoria and supreme confidence. This drug releases a large amount of an organic chemical called dopamine, which, at the same time, provokes feelings of euphoria that increase defensive driving instincts. However, crack users can experience respiratory problems and damage to the heart, among other physical and mental effects such as increased heart rate.