Highway Engineering
In the penetration macadam construction, the bitumen is

Premixed with aggregates and then spread
None of these
Sprayed after the aggregates are spread and compacted
Sprayed before the aggregates are spread and compacted

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Highway Engineering
A traffic rotary is justified where

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

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