There are Traffic controlling authorities at each every Provincial/District level,in addition to NHA,but do not discharge their obligatory jobs,such as fitness of Vehicles,loading of passengers/material up to seating/ loading capacity,running speed from one check point to an other like observed by Traffic Police in Iran & availability of adequate Drinking water & First Aid facilities.Evry one is only concerned with interest of their own,such as Monthly/Bhatta from Bus owners,who compactness it from passengers charging over fixed fair rate.On the other there is no accountability of Tool Tax collected at several Toll Plaza points & its positive purposefull utilization to keep highways always fit/ready for Traffic.Besides if work is in progress at some portion,but no suitable alternate provided to avoid blockage of Traffic for lengthy distance of many Kilometers,that mainly becomes cause of collapse/collision & wrong side driving,resulting in major accidents loosing costly human lives in abundances,as happened at Therhi highway bypass Khairpur.