As a tag, The Road review most likely refers to reviews of Cormac McCarthy's 2006 book, The Road.
It is a popular tag because the book won the Pulitzer Prize for fiction and was a finalist for the National Book Critics Circle Award for fiction. The Road, a tale of a father and son in a post-apocalypse America, not only made numerous "best of the year" lists but also was selected for Oprah's Book Club.
The Road review might also be related to reviews of Jack Kerouac's classic "beat" novel, On The Road.