Building regulations
United States: AASHTO crest curve K by design speed
Drawn to fit this frame, not to a scale. Front faces down the page. Dashed lines are hidden or above; dotted lines are door swings and clearances.
- Category
- Building regulations
- Kind
- Regulation pack
- Languages
- None provided. The words are as the provider wrote them.
- Author
- CadCraft
- Version
- 1, published Nov 9, 2026 Published
Minimum K for crest vertical curves (stopping sight distance) by design speed in km/h. Entered from memory of the published table and NOT confirmed against the book. Check before relying on it.
License
CC0CC0 1.0 (public domain dedication). Anyone may use, change and share it for any purpose, with no conditions. Credit is welcome but not required.
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Regulation pack
Not checked: these numbers have not been confirmed against the standard. Minimum K for crest vertical curves (stopping sight distance) by design speed in km/h. Entered from memory of the published table and NOT confirmed against the book. Check before relying on it.
- Place
- United States
- Pack id
us-aashto-sight- Edition
- AASHTO Green Book (metric), stopping sig
- Authority
- Model code
- Last checked
- 2026-10-28
- Source
- AASHTO, A Policy on Geometric Design of Highways and Streets
| Rule | Clause | Required |
|---|---|---|
| Crest curve K (length per percent of grade change) The minimum for the alignment's design speed, from the table. Not confirmed against the standard. | Green Book ch. 3 | At least 1 mm |
A guide only: the registered professional and the local authority decide. A pack holds numbers and clause numbers, never the standard's text. The Building regulations add-on in BimCraft checks drawings against it.
Versions
All versions| Drawing | Version | Change | License | Status | Published |
|---|---|---|---|---|---|
| Version 1 | GeometryFirst version, from the Building regulations add-on's pack. | CC0 | Published | Nov 9, 2026 |
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