Vincent Matthews, 46, entered a photo titled An educated walk, taken on New Church Road last Thursday.
He said: “The image was taken at the time of the morning school run as I was taking my dog for a walk.”
Once the competition has closed for entries, the photos will be judged and a shortlist and winner chosen by the team at Photography Monthly magazine.
The winner will be announced on the competition entry page on May 12.
Mr Matthews, who tweets as @BrightonPiArt, once documented a year in Brighton and Hove by taking a picture of the city every day.
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