There are a number of culprits in this case
1 the highway authority who allowed to setup such toll plazas without proper design, warning signs and cat eyes to properly warn the incoming drivers of impending danger.of course.they would have received their share from toll plaza contractor but didn't thought about innocent lives which would be lost.
Toll plaza contractor who earns millions but can't spend few thousands to save the people.
Car manufacturers who sell unsafe obsolete cars without safety features.
4 higher officials of this country who don't force manufacturers to provide safe vehicles because they get their share and also because they and their families get and use imported cars which have all the safety gadgets.
And perhaps in the end all of us who accept such rulers and don't raise our voices against injustiice.