1.此处as quickly as用法正确.
2.as...as结构中第二个as为连词,引导比较状语从句,且从句经常为了避免重复而采用省略用法.
3.此题中：The vehicles drive people to their destinations as quickly as to their deaths.
= The vehicles drive people to their destinations as quickly as (the vehicles drive people) to their deaths.
其中的the vehicles drive people和前句完全相同,所以省略.