👉SOME HIGHWAY NOTES
🏷1. Explain The Purpose Of Super Elevation &Widening?
🚧Super elevation used to counterbalance centrifugal force &resists overturning of vehicles.
➡️Factors of supper elevation are👇
⏺Climate condition
⏺Terrain types
⏺Types of area (rural or urban)
⏺Types of facility
🚧Widening used to for visibility of an object on circular curve for psychological & off tracking vehicle.
🏷2. Write The Types Of Terrain & The Difference Between Them?
🚧Types of terrains are
➡️Flat terrain is offer a few obstacle to the construction of road, having continuous unrestricted horizontal & vertical alignment & traverse slope is 0-5%
➡️Rolling ፦slope generally rise & fall moderately ,some restriction in alignment & its traverse slope is 5-25%
➡️Mountainous ፦definet restriction of alignment & ssd ,has steep grade and their traverse slope is 25-50%
➡️Escarpment ፦inclusive of switch back roadway section & traverse slope is >50%
🏷3. Write The Types Of Sight Distance & Explain Them?
🚧SD is distance visible to the driver s o f a passenger’s car.
▶️The types of SD is
⏺SSD is visible to the drivers to stop the passenger’s car before collapsed.
*⃣D=0.278vt+v2/254f
⏺PSD is a minimum SD on the two ways single road way that must be available to enable that the driver of one vehicles to another vehicles safely without interfering with the speed of on coming vehicles at the design speed.
*⃣D1=0.278t1(v-m+at1/2)
*⃣D2=0.278vt2
*⃣D4 =2/3(d2)
⏭PSD=d1+d2 +d3 +d4
⏹where is the speed d/ce b/n passed vehicle & passing vehicles
#HighwayEngineering
@engineer03
🏷1. Explain The Purpose Of Super Elevation &Widening?
🚧Super elevation used to counterbalance centrifugal force &resists overturning of vehicles.
➡️Factors of supper elevation are👇
⏺Climate condition
⏺Terrain types
⏺Types of area (rural or urban)
⏺Types of facility
🚧Widening used to for visibility of an object on circular curve for psychological & off tracking vehicle.
🏷2. Write The Types Of Terrain & The Difference Between Them?
🚧Types of terrains are
➡️Flat terrain is offer a few obstacle to the construction of road, having continuous unrestricted horizontal & vertical alignment & traverse slope is 0-5%
➡️Rolling ፦slope generally rise & fall moderately ,some restriction in alignment & its traverse slope is 5-25%
➡️Mountainous ፦definet restriction of alignment & ssd ,has steep grade and their traverse slope is 25-50%
➡️Escarpment ፦inclusive of switch back roadway section & traverse slope is >50%
🏷3. Write The Types Of Sight Distance & Explain Them?
🚧SD is distance visible to the driver s o f a passenger’s car.
▶️The types of SD is
⏺SSD is visible to the drivers to stop the passenger’s car before collapsed.
*⃣D=0.278vt+v2/254f
⏺PSD is a minimum SD on the two ways single road way that must be available to enable that the driver of one vehicles to another vehicles safely without interfering with the speed of on coming vehicles at the design speed.
*⃣D1=0.278t1(v-m+at1/2)
*⃣D2=0.278vt2
*⃣D4 =2/3(d2)
⏭PSD=d1+d2 +d3 +d4
⏹where is the speed d/ce b/n passed vehicle & passing vehicles
#HighwayEngineering
@engineer03