A road movie is a well-established film genre:
… in which the main characters leave home on a road trip, typically altering the perspective from their everyday lives. (Wikipedia)
This genre is typical American as noted in the following source:
…most Road Movies are US-American. They were produced in the US, they take place in the US, they reflect the US-American way of life and the US-American history.(From History of road movies)
Though this kind of narrative can be traced back to written tales of epic journeys, such as the Odyssey and the Aeneid:
…in cinema, the earliest road movies were about the discovery of a new land or about the expansion of frontiers, as with westerns in North America. Films like “The Searchers,” John Ford’s masterpiece set in the aftermath of the Civil War, were about a national identity in construction. From 'Notes for a Theory of the Road Movie", The New York Times.
Actually the definition road movie" is a relative recent one, and according to Google Ngram its earliest usages are from the '70s.
Questions:
When, by whom and in relation to which movie was the expression first used?
Best Answer
I think that "road movie" didn't gain traction as a descriptive term for a genre of fictional films until the late 1960s or early 1970s. The movies associated with it at that point were (most crucially) Easy Rider (1969) and (secondarily) Two-Lane Blacktop (1971). Wikipedia cites Bonnie and Clyde (1967) as another key movie in the genre, but I think that view is a bit of a stretch; in my view, it would be more accurate to call Bonnie and Clyde a "crime spree film."
Although movies set largely on the roadways—such as the trucker-focused films They Drive By Night (1940) and Thieves Highway (1949)—or examining alienated young people on wheels—like The Wild One (1953)—or dealing with interstate crime sprees—like Gun Crazy (1950)—had been screening for decades, the descriptive term "road movie" as a plot genre did not become popular until significantly later.
Literal 'road movies': Documentaries about roads
It is certainly true that older nonfiction movies about highway or road construction were sometimes termed road movies or highway movies. Such films are mentioned in, for example, Ontario Ministry of Transportation and Communications, M.T.C. Report No. RR., issues 137–155 (1967):
and earlier still in Proceedings of the Annual Convention of the American Road Builders’ Association (1940):
The term "road film" seems to have been somewhat more common than "road movie" for these productions. One example appears in "The Motion Picture Film in Highway Bond Campaigns," in The American City (February 1920):
However, these industrial road-making movies have no relevance to the later genre name.
Another seemingly literal use of "road movie" appears in Ron Delpit, "My Side of the Story," in the Madera [California] Daily Tribune (October 13, 1965):
This article is about the Los Angeles Dodgers, which were playing (and trouncing) the New York Yankees in the baseball World Series that year. The Dodgers were a veteran team, a point that prompted the writer to equate their familiarity with passing scenery to "an old road movie." The comparison is odd and seems to exist in a vacuum; at any rate, I don’t find any other references to "road movies" in the sense (seemingly) of footage captured out the window of a moving vehicle.
Goofy 'road movies': Carry on, Bob & Bing
As rjpond's answer notes, Bing Crosby and Bob Hope appeared in a series of seven semi-romantic adventure/comedy films between 1940 (The Road to Singapore) and 1962 (The Road to Hong Kong) that had in common (besides frequent appearances by Dorothy Lamour) the words "Road to" or "The Road to" at the beginning of their titles—and these films did become widely known as the duo's "Road" movies. Strictly speaking, however, these are not "road movies"—they are "buddy films." Ultimately, associating Hope and Crosby with the modern understanding of the term "road movie" makes about as much sense as linking "Carry On" gang films with the concept of carry-on luggage.
Literary 'road movies': A genre of fictional films
The first Google Books match for "road movie" in its fully evolved modern sense is an item in Newsweek magazine, volume 78 (1971) [combined snippets]:
This instance occurs within a year of the first OED match for the term from late 1970 in the New York Times (as mentioned in rjpond's answer). But given that Newsweek wasn't (and isn't) at the forefront of cineaste culture, you’d have to think that by the time the genre term "road movie" showed up there, it had already been floating around in popular culture for some time.
A slightly earlier instance of the related term "road picture" appears in a review of Goin' Down the Road (1970) in Motion Picture Herald (1970) [combined snippets]:
This review probably antedates the New York Times's December 6, 1970, instance of "road movie." The term used here is slightly different, but its meaning is clearly the same. The example provides further evidence that Easy Rider served as the archetypal "road movie" as that genre emerged.
An early instance of 'road movie' in film criticism
The most interesting early instance of "road movie" in the Google Books search results is the one in the 1953 issue City Lights magazine. Multiple followup Google searches reveal that the article in which it appears is Jordan Brotman, "Ace on the Road: Kirk Douglas and Hollywood," in City Lights issue 4 (Fall 1953) [combined snippets]:
This excerpt is interesting for several reasons, perhaps the most striking of which is that, although Brotman is interested in "the road movie" as a cinematic archetype, his preferred term for the genre is "highway movie." This becomes clear when we look at the opening paragraphs of the piece:
I have grave doubts about the legitimacy of Brotman's assertion that "highway movies" were something new under the sun in the postwar world. One can scarcely deny the highway theme of Sullivan's Travels (1941), for example, or its direct dramatic antecedent I Am a Fugitive from a Chain Gang (1932). Brotman seems likewise oblivious to the essential role of the road (and the railroad) in The Grapes of Wrath (1940). Even the western had an early highway epic in the form of Stagecoach (1939), nine years before Red River reached the screen. And what is The Wizard of Oz (1939) if not a "highway movie" set in a world without internal combustion engines?
But be that as it may, the relevant points here are that Brotman's essay identifies the metaphor of the road as central to an American mythos that serious American films, at a certain point, embraced wholeheartedly—and that he seems to have coined the term "highway movie"—and (incidentally) varied it at one point as “road movie”—to describe this genre.
Is Brotman's essay the source of "road movie" as a genre name? On first consideration, it seems absurd to suggest that an essay in a little-read art and poetry magazine could have had such influence. However, contextual information lends at least a little more weight to the possibility. As noted earlier, the essay was written in 1951 and published in 1953 in City Lights, a San Francisco periodical associated with Beat poet Lawrence Ferlinghetti, who also co-founded San Francisco's City Lights Bookstore in 1953. According to Wikipedia, Jack Kerouac conceived the Beat classic On the Road in the late 1940s "and then typed [it] out on a continuous reel of paper during three weeks in April 1951"—although the novel was not published until 1957.
I don't think it is at all far-fetched to imagine that these Beat emigres from New York and other points East to the Golden West had a soft spot, if not a preoccupation, with "the road" as a quintessentially American symbol of adventure, hope, and self-discovery. Kerouac's book, which follows semi-aimless artsy-drugsy protagonists as they drift westward across the United States, was extraordinarily popular with an audience of aspiring hipsters and alienated youth—people who didn't yet know that they would eventually become middle managers at large corporations.
Conclusion
Whether Jordan Brotman's use of "highway movie" and (in one instance) "road movie" in his 1951/1953 essay "Ace on the Road" had any direct (or indirect) impact on subsequent cinematic terminology is certainly debatable, although I imagine that in Beat coffeehouse culture the essay was widely discussed. Realistically, popular consciousness of the term "road movie" in its modern sense seems to have occurred no earlier than 1970 or 1971.
The immediate need for a descriptive label for what became known as "road movies" was almost certainly due to the phenomenal success of Easy Rider (1969)—an extremely influential youth film that became a defining artifact of 1960s counterculturalism.
Jack Kerouac's novel On the Road, meanwhile, deserves a lot of credit for making impulsive, vaguely defined quests seem cooler than cool to members of a commercially desirable movie-going demographic—and once a cool plot line has resonated with the public, a mountain of screenplays is sure to follow.