They are both equally dangerous and impair your ability to make sensible decisions.

Both! Don't do ethier cause it can kill innocent people!

Drinking and driving is worse and there is no studies that have proven that smoking weed affects driving in any way.There has been many studies with booze and it's effects on the ability to operate a car showing the response times as been less,but no studies have been done on weed and response time.Though trolls are still downrating the answer.

6 of one, half a dozen of another. Driving while you are impaired is pretty much the same - no matter what intoxicant you choose.. A number of studies have examined illicit drug use in drivers involved in motor vehicle crashes, reckless driving, or fatal accidents. For example: * One study found that about 34 percent of motor vehicle crash victims admitted to a Maryland trauma center tested positive for “drugs only”; about 16 percent tested positive for “alcohol only.” Approximately 9.9 percent (or 1 in 10) tested positive for alcohol and drugs, and within this group, 50 percent were younger than age 18.4 Although it is interesting that more people in this study tested positive for “drugs only” compared with “alcohol only,” it should be noted that this represents one geographic location, so findings cannot be generalized. In fact, many studies among similar populations have found higher prevalence rates of alcohol compared with drug use.5 * Studies conducted in several localities have found that approximately 4 to 14 percent of drivers who sustained injury or died in traffic accidents tested positive for delta-9-tetrahydrocannabinol (THC), the active ingredient in marijuana.6 * In a large study of almost 3,400 fatally injured drivers from three Australian states (Victoria, New South Wales, and Western Australia) between 1990 and 1999, drugs other than alcohol were present in 26.7 percent of the cases.7 These included cannabis (13.5 percent), opioids (4.9 percent), stimulants (4.1 percent), benzodiazepines (4.1 percent), and other psychotropic drugs (2.7 percent). Almost 10 percent of the cases involved both alcohol and drugs.

Neither is worse, both equally bad behavior.