Top 5 vehicles/methods of transportation.
1. Doctor Who: The Tardis. Obviously. It can go back and forth in time, travel through space, it's bigger on the inside, and sometimes it has David Tennant inside it.
2. That 70s Show: The Vista Cruiser. It's so iconic of the show and of the time. It represents adulthood, (a limited degree of) freedom for Eric, (a limited degree of) trust from his father, and a place for romance. So much happened throughout the show both inside the Vista Cruiser and on its bonnet, including Eric and Donna's first kiss and final conversation. And of course, the entire credit sequence is set inside it!
3. White Collar: Peter's Ford Taurus. This has been quite the successful product placement for the show, and we often get to see how great the new Ford Taurus is at 'doing the driving for you'. But more than that, I see it as a safe place for Peter and Neal to talk during driving or stake-outs, to get to know each other when they don't have to look at each other. In celebration of this, let us watch this excellent Youtube video made by ant3ka to 'I Woke Up In A Car' (spoilers for season 1):
Click to view
4. Supernatural: The Impala. How can you not love Dean's car? It's almost as much a part of the show as the boys are, and it's infinitely more reliable. In a life of motel rooms and general displacement, the Impala is home.
5. Grey's Anatomy: The hospital elevators. They're not vehicles, admittedly, but they are definitely methods of transportation. And everything has happened inside them, from kissing to crying to sniffing-of-hair to marriage proposals to open heart surgery.
Runner up: Torchwood: The invisible elevator. Because sometimes it's nice to use the tourist entrance.