Short answers, pulled from the story.
George Smith, a London taxi cab driver, was the first person convicted of driving a motor vehicle while intoxicated. He was convicted on the 10th of September 1897 under the "drunk in charge" provision of the 1872 Licensing Act and fined 20 shillings.
DUI stands for "driving under the influence" and DWI stands for "driving while intoxicated" or "driving while impaired." Both terms describe the same basic offense of operating a vehicle while impaired by alcohol or drugs. Different US states and countries use different abbreviations, including OWI, OVI, and DUII, for the same category of crime.
Alcohol is involved in 30 percent of all traffic fatalities in the United States. One study of drivers seriously injured in crashes found that 23.6 percent tested positive for alcohol.
The Drug Evaluation and Classification program is a twelve-step process used by certified Drug Recognition Experts to detect drug-impaired drivers and identify the category of drugs present. It was developed by the Los Angeles Police Department in the 1970s and is now recognized by all fifty US states, Canada, and the United Kingdom.
Colorado law sets 5 nanograms of active tetrahydrocannabinol (THC) per milliliter of whole blood as the threshold at which a driver can be prosecuted for DUI. Officers can still make an arrest at any THC level if they observe impairment.
Wet reckless is an informal term for a plea bargain in which a driver charged with DUI agrees to plead guilty to reckless driving in exchange for the drunk driving charge being dropped. In California, wet reckless can only arise as a plea bargain outcome after a DUI charge has been filed; it is not a charge police can issue directly.