eing repaired 与 the right side of the road 中间有个逗号吧.
being repaired,the right side of the road is closed for the time being.
由于右侧道路正在修理,暂时把它关闭.
the right side of the road 主语
is closed for the time being 整个看成谓语
is 系
closed 表语（补语）
for the time being 时间状语
being repaired 非谓语从句作定语