Car

Cars or automobiles were a very common means of transport for Humans on Earth during the 20th and 21st centuries.

20th century
During his exile on Earth the Doctor drove a yellow roadster called "Bessie" (DW: Doctor Who and the Silurians). The Brigadier procured Bessie as part of an agreement to persuade the Doctor to work with UNIT, after the Doctor had expressed fondness for a similar vehicle which he had "borrowed" shortly after arriving on Earth (DW: Spearhead from Space). Bessie remained (in UNIT's care) on Earth when the Doctor regained his time travel knowledge, and was used by his fourth, seventh and eighth incarnations on subsequent visits to Earth. (DW: Robot, Battlefield, NA: The Dying Days)

While still affiliating with UNIT "post-exile", the Doctor also briefly used a different car with a "space-age" look and hovering/flying capabilities. (DW: Invasion of the Dinosaurs, Planet of the Spiders)

Sarah Jane Smith was seen to drive multiple small cars over time, while a companion of the Doctor (DW: Robot, School Reunion) and after (K9 and Company, The Sarah Jane Adventures).

21st century
In his eighth incarnation the Doctor used a Volkswagen Beetle, that he could drive into his TARDIS (it resided within its own alcove), the Doctor traded it for information from the Faction Paradox concerning Samantha Jones whilst in San Francisco in 2002. (EDA: Vampire Science, Unnatural History)

Luke Rattigan created ATMOS, a device which stopped cars from producing CO2. In actuality, ATMOS would enable a Sontaran invasion of Earth (DW: The Sontaran Stratagem/The Poison Sky).

Donna Noble had a pivotal moment while driving her car, where turning left brought about her first meeting with the Doctor. When elements of the Trickster's Brigade caused her to instead turn right, an alternate world was created in which she never met the Doctor, causing his death and dramatic changes to the history of Earth. She was able to time travel and correct the error, once again turning left and restoring events to their original course. (DW: Turn Left)

Advancements
In the far future cars such as the New Earth Car could hover. (DW: New Earth, Gridlock)