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Apr 20, 2020 at 15:08 comment added DavidJ The change of arc and cross slope is distributed along the the running distance of the transition to minimize abrupt change in forces on the vehicle. In highway design, the tangent section cross slope is selected for surface runoff benefit. The curve section cross slope is determined by design velocity and radius of curve. See en.wikipedia.org/wiki/Banked_turn .
Apr 16, 2020 at 17:08 comment added Marino Supposedly, the Euler spiral is difficult to build. Therefore a compromise has been made with a multi-radius transition. The transition curve passes through a couple of decreasing rediuses before it reaches the corner with constant radius.
Apr 2, 2020 at 20:21 vote accept Marino
Apr 2, 2020 at 20:26
Apr 2, 2020 at 19:25 review First posts
Apr 2, 2020 at 20:42
Apr 2, 2020 at 19:24 history answered DavidJ CC BY-SA 4.0