and it took less than two weeks." Schrader recalls, "I realized I hadn't spoken to anyone in weeks [...] that was when the metaphor of the taxi occurred to me. That is what I was: this person in an iron box, a coffin, floating around the city, but seemingly alone." Schrader decided to make Bickle a Vietnam vet because the national trauma of the war seemed to blend perfectly with Bickle's paranoid psychosis, making his experiences after the war more intense and threatening. In Scorsese on Scorsese, Scorsese mentions the religious symbolism in the story, comparing Bickle to a saint who wants to cleanse or purge both his mind and his body of weakness. Bickle attempts to kill himself near the end of the movie as a tribute to the samurai's "death with honor" principle. Dustin Hoffman was offered the role of Travis Bickle but turned it down because he thought that Scorsese was "crazy." Pre-production While preparing for his role as Bickle, De Niro was filming Bernardo Bertolucci's 1900 in Italy. According to Boyle, he would "finish shooting on a Friday in Rome ... get on a plane ... [and] fly to New York." De Niro obtained a taxi driver's license, and when on break, would pick up a taxi and drive around New York for a couple of weeks before returning to Rome to resume filming 1900. De Niro apparently lost and listened repeatedly to a taped reading of the diaries of criminal Arthur Bremer. When he had time off from shooting 1900, De Niro visited an army base in Northern Italy and tape-recorded soldiers from the Midwestern United States, whose accents he thought might be appropriate for Travis's character. Scorsese brought in the film title designer Dan Perri to design the title sequence for Taxi Driver. Perri had been Scorsese's original choice to design the titles for Alice Doesn't Live Here Anymore in 1974, but Warner Bros would not allow him to hire an unknown designer. By the time Taxi Driver was going into production, Perri had established his reputation with his work on The Exorcist, and Scorsese was now able to hire him. Perri created the opening titles for Taxi Driver using second unit footage which he color-treated through a process of film copying and slit-scan, resulting in a highly stylised graphic sequence that evoked the "underbelly" of New York City through lurid colors, glowing neon