(literary) they

going side by side / being concurrent / (uncommon) being parallel

side by side / concurrent / parallel

go side by side / be concurrent

to run; to move at a high speed / to appear briefly; to flash / to give over oneself to; to commit oneself to (usually something bad) / (music) Alternative spelling of ハシる

run

race; run

parallel import

those (referring to things distant from the speaker)

(colloquial, of a vehicle) roaring noisily around