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The highway engineers later determined that the majority drivers will naturally make that spiral transition with the vehicle; consequently, spiral curves are only used on highways in special cases nowadays.
Because they were used in the past and in particular cases today, we need to identify how to calculate them.
From the surveyor’s viewpoint, the design of spiral curves has previously been determined by the engineer and will be documented on existing R/W and As-built plans.
All we have to do issue, the information shown on these plans to fit the spiral curve inside our surveyed alignment
SPIRAL CURVES
Spiral
curves were initially designed for the Railroads to smooth the transition from
a tangent line into simple curves. They helped to lessen the wear and tear on
the tracks. Spiral curves were implemented at a soon date on highways to
provide a smooth transition from the tangent line into simple curves.
The highway engineers later determined that the majority drivers will naturally make that spiral transition with the vehicle; consequently, spiral curves are only used on highways in special cases nowadays.
Because they were used in the past and in particular cases today, we need to identify how to calculate them.
From the surveyor’s viewpoint, the design of spiral curves has previously been determined by the engineer and will be documented on existing R/W and As-built plans.
All we have to do issue, the information shown on these plans to fit the spiral curve inside our surveyed alignment
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