Highway Engineering
Centre line markings are used

to designate proper lateral placement of vehicles before turning to different directions
to indicate that overtaking is not permitted
to designate traffic lanes
in roadways meant for two way traffic

ANSWER DOWNLOAD EXAMIANS APP

Highway Engineering
A traffic rotary is justified where

space is limited and costly
when traffic volume is more than 5000 vehicles per hour
when traffic volume is less than 500 vehicles per hour
number of intersecting roads is between 4 and 7

ANSWER DOWNLOAD EXAMIANS APP