Spiral Curves for Highway Alignment

#HorizontalCurves #HighwayDesign #DanielFindley

[esagido]

best highway teacher in you tube highly recommended

[philanimkhize]

Best lecturer..I remember using this when I was on campus.Now I'm back for revision.

[NeilRobicheau]

Great video. My 20 year-old notes from college weren't making sense. You helped bring it all back. Thank you.

[TexasDallas]

Thank you! I haven't dealt much with spiral curves in over 30 years and your video helps.

[jdagle]

Thanks for the video it was very helpful! I know you touched on how points could be located along a spiral by deflection, just like a horizontal curve but do you mind explaining the values that theta S/3 is multiplied by? It looks like a cursive L over another L squared?

[jle]

Would it be important as a surveyor when locating a road or railroad tracks to locate not only an accurate as possible pc and pt begin and end but the pcc as best that they can actually visually tell in the field or has technology surpassed having to use these types of more old school methods in the field and the office side can calculate more efficiently now than is needed? I have been surveying for about 17 years and I started implementing an experiment so to speak where I indicated what I believe to be points of compound curvatures etc when I did a couple of projects that would have sidewalks designed crossing over railroad and highway right of ways. My forethought was that yes we have some pins marking the right of way east and west along the right of way but for safety sake I would want to see a tight check of the offset off of the edge of tracks, road etc to the row. I haven’t had a chance to work in the office before and never get a lot of good answers from them most of the time because they’re pretty busy but I was wondering if I’m just overthinking this or if I am on to something.

[orlyjayberay]

Great Video Doctor Findley, as I was searching for an information about your research and background in transportation, I got interested on your book entitled "Highway Engineering - Planning, Design, and Operations, the 2nd edition" Is there any chance I can get a copy of this book I'm currently teaching as an Instructor in one of the university in the philippines. I want to learn more about Highway Engineering such as fundamentals with regards to this subject. Hoping for your response.

[derihilyas]

Hi I have a question for the PI that have different length of spirals, cause when I calculate this with normal formula it doesn't match with the one that I created with AutoCAD

[marksalvador]

when do we used spiral curve in road design?

[นิติกรมานะการ]

If Ls in not equal to Ls out. What the formular to calculate Ts

[marc]

hello can you derive some formulas of the spiral curves? thank you

[slimlady]

Hey can i ask you question please?
I need help with that (it's down there)