As you walk down Sunset Boulevard to either the Tower of Terror or Rock 'n Roller Coaster or perhaps to see Fantasmic!, you'll pass by a souvenir cart that has a unique theme and some signifigance as to why it's there. The bright red cart, made to look like a trolley car, sells mostly pins these days but it's been a staple along Sunset Boulevard for years, in fact, ever since the street opened in 1994.
The first signifigance of the car is the car itself. The trolley car look isn't just random, but plays into the backstory that has been established back up the street at the corner of Hollywood and Sunset Boulevards. There, you'll find the Tip Board and restaurant reservation counter all with a theme of a Pacific Electric Railway station. With that in mind, Imagineers opted to have a cart look like one of the Pacific Electric cars.
If you look closer, you'll find some more signifigance hidden on the cart. With the cart meant to look like a trolley car, Imagineers dressed it up with signs and color and other essentials to complete the look. Included with these aesthetics is the trolley car number. Imagineers love to hide details in numbers since they are often overlooked by guests but the number on this car, 694, refers to the date when Sunset Boulevard opened up in June of 1994. The numerical representation of that date is 06/94, hence 694.