a sea of blue police lights and sirens erupted at the bottom of the hill and began snaking up the halfmile driveway

a sea of blue police lights and sirens erupted at the bottom of the hill and began snaking up the halfmile driveway. 

 언덕아래서 파란 경찰 불빛과 사이렌들의 바다가 분출되었다.

 그리고 뱀처럼 꿈틀거리며 반마일 driveway 를 올리기 시작했다.