The name of the gas station Michelle stopped at to refuel is named "Kelvin". This is an Easter Egg J.J. Abrams slips into all his projects, a tribute to his maternal grandfather Henry Kelvin, who owned an electronics company and influenced Abrams as a boy.
Emmett (John Gallagher Jr.) handles a VHS tape of the fictitious movie "Cannibal Airlines." This is an Easter egg, one of a series of satirical VHS packages created by writer Rob Schrab and used as decorations at producer J.J. Abrams' Bad Robot production offices.
Michelle's network carrier on her phone is "BRT". This is a shortened version of J.J. Abrams' production company, "Bad Robot".
All of the visual effects were done in-house by Kelvin Optics at Bad Robot studios.
Mary Elizabeth Winstead is barefoot on the majority of the movie. In an interview, she stated that in a lot of the close-up shots that did not show her feet, she was wearing slip-on shoes or flip flops.
John Goodman was wearing a Missouri shirt through part of the movie. He was born and raised in Missouri.
In one scene, for a brief second or two, you can see an envelope delivered to Howard. His last name, along with his address can briefly be seen. 10 Cloverfield Lane, Lake Charles, Louisiana.
The first trailer for this film was screened before 13 Hours (2016), a Michael Bay film. Cloverfield (2008) also had a secretive production and marketing with its first trailer being released before Transformers (2007), another Michael Bay film.
The trailer for the film, attached to the theatrical release of 13 Hours (2016), was released and publicized only two months before the film's own U.S. theatrical release, an unusually short time for advertising and promo for a film released by a major studio.
Mary Elizabeth Winstead drove a Volkswagen Bora in this film, which is identical to the car she drove in Final Destination 3 (2006).
Follows a noticably similar plot trajectory to another bunker-survival picture, The Divide (2011), although with far less violence or sexual depravity.
This is not John Goodman's only film featuring a bunker. He also starred in Matinee (1993), another film in which people take to a bunker under questionable--though more humorous--circumstances.
Michelle's car is a red 2003 VW Jetta GLS TDI sedan with automatic transmission and a Pioneer DEH-2300RB MOSFET 50 Wx4 CD player/car radio receiver.