What is the genre?

"Auto Wreck" is a free verse poem, meaning that it has no rhyme scheme and no consistent meter. Some lines are iambic, meaning that every second syllable is stressed ("And down the dark one ruby flare"), and some lines are a mixture of different meters. The line "And the ambulance with its terrible cargo," for instance, begins with an anapest ("And the am") followed by an iamb ("ulance"). This irregular meter, combined with the absence of any regular rhyme scheme, helps to create a more realistic and staccato tone, echoing the harsh reality and chaos of the poem's subject matter.
The poem might also be considered an elegy, in that it has, especially in the second and third stanzas, a sad, mournful tone. It is also, for the last two stanzas, focused on feelings and ideas about death. The last lines of the second stanza, for example, ponder the seemingly arbitrary nature of death, and the opening line of the third stanza reflects that "death in war is done by hands."