Jeez, I hope this doesn't last too long...

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Re: Jeez, I hope this doesn't last too long...

Postby jasonh300 » Fri Aug 24, 2012 10:13 pm

I have no concept of what 14% grade is. What is that in degrees? Or rise over run?

I've seen those signs before in eastern Tennessee between Chattanooga and Nashville, and also in Pennsylvania around Bethlehem. I know when the number's above 10, it's pretty friggin steep. I was also driving a moving van through Kentucky one time and couldn't maintain 30 MPH on the interstate on an incline.

Of course, I live in a place where you can park in neutral and not set the parking brake and your car will probably not move an inch.
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Re: Jeez, I hope this doesn't last too long...

Postby jasonh300 » Fri Aug 24, 2012 10:37 pm

fvwazing wrote:14% means the road drops 14m if you drive 100m. That is pretty steep.


What is that in feet? :lol: j/k

Yes, that's pretty steep. I did some research and the steepest grade on the U.S. Interstate system is 8%, and I have driven it (I-24/US-41/64 Westbound over Monteagle Mountain, TN).
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Re: Jeez, I hope this doesn't last too long...

Postby jasonh300 » Sat Aug 25, 2012 12:03 am

mapcat wrote:What the hell are trucks doing on that road?!

Where is that? I want to make sure I avoid it.


I hope that it's just a picture of a truck, placed there to cast fear into the hearts of anyone who attempts to drive that road.
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Re: Jeez, I hope this doesn't last too long...

Postby jasonh300 » Sat Aug 25, 2012 1:58 am

mapcat wrote:
jasonh300 wrote:I hope that it's just a picture of a truck, placed there to cast fear into the hearts of anyone who attempts to drive that road.

Sign says "Trucks use lower gear".


It works, doesn't it?
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Jeez, I hope this doesn't last too long...

Postby jasonh300 » Sat Aug 25, 2012 6:56 am

harling wrote:14% grade: arctan(0.14) = 8 deg.
27% grade: arctan(0.27) = 15 deg.
33% grade: arctan(0.33) = 18 deg.


So would 100% be 45 deg. or 90 deg.?
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Jeez, I hope this doesn't last too long...

Postby jasonh300 » Sat Aug 25, 2012 7:24 am

AlanOfTheBerg wrote:
jasonh300 wrote:So would 100% be 45 deg. or 90 deg.?

I imagine it would be 45deg where rise=run. Or run=fall. :o


Fall is right in that case. At that angle, I don't think anyone would be rising.
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Jeez, I hope this doesn't last too long...

Postby jasonh300 » Sat Aug 25, 2012 1:41 pm

fvwazing wrote:1m down for 1m of road? 90 degrees, of course.

Edit:
Oops, my bad. Definition uses horizontal movement, not length of road.


Actually, you did say "length of road" (hypotenuse?) in your first post, but everything else involving pitch or grade is measured rise over run, so I suppose this would be too.

It's been 23 years since my last geometry class...
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Re: Jeez, I hope this doesn't last too long...

Postby mapcat » Fri Aug 24, 2012 11:58 pm

What the hell are trucks doing on that road?!

Where is that? I want to make sure I avoid it.
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Re: Jeez, I hope this doesn't last too long...

Postby mapcat » Sat Aug 25, 2012 1:28 am

jasonh300 wrote:I hope that it's just a picture of a truck, placed there to cast fear into the hearts of anyone who attempts to drive that road.

Sign says "Trucks use lower gear".
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Re: Jeez, I hope this doesn't last too long...

Postby mapcat » Sat Aug 25, 2012 4:37 am

jasonh300 wrote:It works, doesn't it?

"Trucks TURN AROUND NOW" would work better.
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