 | Parkways and park roads |  |
HOWLAND'S FOURTEEN STEPS:
My purpose in spending so many hours in developing a method
for you to use in calculating Transition Curves with a pocket calculator
is that you will be more effective in the field. If you
will remember what we did together in Surveying and in Park Roads,
you will be able to lay-out roads and hold your own.
Within the capabilities of Barnett's Tables, and Howland's
Fourteen Steps, you can indeed refine the Transition Curve where
the spiral of one curve will join the adjacent spiral at the same
point:
S.T.1 = T.S.2
Furthermore, you can eliminate the circular curve altogether:
S.C.1 = C.S.1
Combining the two features, the Transition Curve produced would
have neither tangents nor circular curves. The curves would be
transitional throughout.
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