Ethio Construction Engineering
👉Some Highway Engineering Note 🚧A horizontal curve in a highway, is a curve which is provided to change the direction of the central line of the road. 🚧When a vehicle traverses a horizontal curve, the centrifugal force acts horizontally outwards through…
👉Some Highway Engineering Notes
🚧Stopping distance = Lag distance + Braking distance
▶️Lag distance = Distance travelled by the vehicle during the total reaction time.
▶️Braking distance = Distance travelled by the vehicle after the application of the brakes, to a dead stop position.
🚧In ascending gradients, braking distance decreased.
🚧In descending gradients, braking distance increases.
🚧Stopping sight distance and Stopping distance are different.
🚧Minimum Stopping sight distance = Stopping distance in following cases
(In one way traffic lanes,In two way traffic roads having 2 or more traffic lanes)
🚧Minimum Stopping sight distance = TWICE the Stopping distance in following cases
( On roads with restricted width , On single lane roads when two way movement of traffic is permitted)
🚧The Stopping sight distance (SSD) should be provided throughout the length of all roads and hence this is also known as absolute minimum sight distance.
🚧Higher Stopping sight distance is required in case of descending gradients.
#HighwayEnginnering
#etconp
🚧Stopping distance = Lag distance + Braking distance
▶️Lag distance = Distance travelled by the vehicle during the total reaction time.
▶️Braking distance = Distance travelled by the vehicle after the application of the brakes, to a dead stop position.
🚧In ascending gradients, braking distance decreased.
🚧In descending gradients, braking distance increases.
🚧Stopping sight distance and Stopping distance are different.
🚧Minimum Stopping sight distance = Stopping distance in following cases
(In one way traffic lanes,In two way traffic roads having 2 or more traffic lanes)
🚧Minimum Stopping sight distance = TWICE the Stopping distance in following cases
( On roads with restricted width , On single lane roads when two way movement of traffic is permitted)
🚧The Stopping sight distance (SSD) should be provided throughout the length of all roads and hence this is also known as absolute minimum sight distance.
🚧Higher Stopping sight distance is required in case of descending gradients.
#HighwayEnginnering
#etconp
👍2