285 Ton Oversize Load Causes The Roosevelt Lake Bridge To Flex Under The Load 8-16-11
ฝัง
- เผยแพร่เมื่อ 17 ส.ค. 2011
- DOUBTERS WATCH THIS: • Video . It was just after 7am. on August 16th, 2011, when this 285 ton anode made its way over the Roosevelt Lake Bridge on Arizona Highway 188. This anode was on the final leg of its long slow journey from Salt Lake City to the Freeport-McMoRan copper and gold mine in Miami, Arizona. It was reported by the media that the anode weighed 285 tons (Although I think that weight really is the Gross Combined Weight of the entire setup) and it's transport rig stretched 225 feet. Proof that this was a heavy load can be seen as the load progresses across the bridge. Watch the concrete walls and the fencing on them and you will see their upward arch flatten out as the load crosses! TO SEE A COUPLE OF MUCH SLICKER VIDEOS OF THE ENTIRE MOVE OF THIS ANODE, WATCH---Precision Heavy Haul "Riding With The Giants Part 1 • Precision Heavy Haul "... and Part 2 • Precision Heavy Haul "... . To see the full effect of the deflection of the bridge check out this link from Xiaoke Ding (carveid4): • Video . Thanks to Xiaoke for showing what I couldn't.
- ยานยนต์และพาหนะ
![[Ginko] Roadmovie Bus Solaris Urbino III sur la ligne L3 de Besançon ☘️](http://i.ytimg.com/vi/LgkP7bNEbxw/mqdefault.jpg)
![ตีสิบเดย์ [FULL] | คู่รักแซฟฟิก "หลิงหลิง - ออม" จากซีรีย์ "ใจซ่อนรัก"](http://i.ytimg.com/vi/zs8AfphGn2w/mqdefault.jpg)
To everyone that is watching this video, I thank you! Before leaving a comment, please read the description. If you still want to leave a rude or insulting or disrespectful comment, or if you start crying about wanting your time back, just know that it will be immediately removed.
Yes thanks, I actually did pin this comment yesterday when I posted it, but for some reason I also noticed that it's not the lead comment in the comments section.
@Jeff Holland why let illiterate fools clogged up a comment section with idiocy?
@Jeff Holland because his channel? He might do as he pleases you know 😅
@Jeff Holland unsurprising attempt at ad hominem attack because you don't have a valid argument.
You think commenting means a person is a puppet? Then whose puppet are you?
You really need to up your game, this is just pathetic and boring.
Sure I can take the heat, but none of these troll pussies commenting like this and like you are wouldn't have the nuts to tell me any of this to my face. Only with the safety of anonymity and distance do you feel safe to talk shit to someone you don't know. It's all about respect. It's a really simple equation. I'm a nice guy and I'm easy to get along with, and I treat everyone with respect. You get what you give with me. Since you decided to let your fingers do the talking and leave the kind of comment that a shitbag would have left, you just proved to the world that you are just that....a shitbag.
I'm amazed that they would move the stargate out in the open like this.
😂
I bet most people don't get the reference...ok O'Neill were goin in
Step away from the bong. This is real life
The best place to hide something sometimes is right out in plain view. Gotta think like MacGuyver, ya know?
Well, it would explain the 2016 election year AND how this year has turned out so far. lol
The great thing about tripods is they keep the image still.
Only if the owner refrains from a grabbing a leg and giving it a good shake.
hahaha lol,
Ha! Miles.
Good thing there is a flashing light on this convoy, otherwise might be hard to spot and avoid. Not much time to get out of the way either. Safety team nailed it.
I bet they closed that bridge during transport
Great. Now it can fall through the road like normal. Perfect comment too.
Nice video. In around 1975 I worked for Hoffman , Belleville NJ and was on the team that moved loads up to 900tons. We placed nuclear pressure vessels in containment domes. Transported from barge that had a 1000ton electric hoist for transfer from barge to our vehicle. The tractor was a converted 60yard mine hauler w/5th wheel . We didn’t travel fast but production at the site stood still to watch 900ton go up the haul road to the containment bldg. If you are Jimmy Hoffman and reading this, thank you for the experience!
Go to 6:30 and press the "J" and "L" keys to see the bridge deform. The "J" and "L" keys move the video by ten seconds and the deformations are more apparent with that kind of jumping.
Don't you mean 6:00?
it was not until now that i knew J and L skipped like that. thx.
I was going to suggest a time-lapse or other speed-up to show the bridge's gradual shape change. (Xiaoke Ding's edited version does that.) Jumping forward and back is good too. These techniques would be more effective if the camera was mounted on a tripod (stationary) for the duration. Perspective is important too.
quaztron
i was looking so fucking hard ... ty
Now that’s engineering on both parts, the truck for being able to pull that load and the bridge for flexing and not collapsing under it. Nice vid👍
Thank you! It really is a good display of what engineering is all about.
You can see it very well if you use your right and left arrow keys to move forward and back in 5 second increments.
So, how did your Mother-in-law enjoy the trip?
pause it and play it again as it comes over the hump watch the railings on the right and the top beams unbelievable..!Nice video thanks.
In a Hanna-Barbera version a butterfly would land on the anode and the bridge would collapse.
LOLOLOL....now THAT'S random.
After staring directly into the camera.
I needed that laugh. True too.
I couldn't see anything. Maybe put a time stamp on where it flexes under the weight.
That’s what you call crazy. Putting a lot of faith with that much weight into bridges built by the lowest bidder🤨
Same goes to using a condom
Actually built by a builder chosen by a bonding company when the low bidder went broke. His bonding company had to take over and finish the job. It seriously impacted the work on the dam at that time. The contractor putting in the new lake tap had to contend with traffic over the dam until the delayed bridge was finished.
Science is a wonderful thing
At about 7 minutes, they go across. That was impressive to watch on MANY levels!
I worked at a shop that shipped with heavy haulers. Always amazed me the loads they could move. Biggest job we ever shipped had 96 wheels under it. Through the city streets of St Louis.
Cool! Aside from the shear size of that load, I presume it was pretty large in dimensions, I bet the weight of it would probably have been easily handled on an 8-axle (16-wheel) train car.
Thanks for the comments. I'm surprised that I didn't have any competition for that location! I wasn't the first with a camera to arrive on scene, but no one else really saw the potential of this spot. I felt lucky to get this vantage point.
Well if I was flying my drone seven years ago I would have had the best location from the air all around it.
You did a great job. Tooshy naysayers!
You did an excellent job of capturing the flexing of that bridge. Even at normal speed the flexing is obvious. WOW!!!
My company fabricated and erected the bridge
So some of the welds were mine
Sweet! Looks like my fleshlight has been shipped.
LMAO
LMAOOOOOOOOOOO!
wow lol.
PAMALA ANDERSON VAGINAL REPLICA
Amazing comment. Top tier
I could not see any flexing happening, but maybe that was because they were moving slow per their procedures.
Use your right and left arrow keys to move forward and back in 5 second increments.
I think that's where the downvotes are coming from. If you watch the rock in the distance at the roads edge on hill - when the first trucks pass over it roadway does not move much. When anode does you see the significant gap take place. Start at 5:16 rock on right side view almost covered by wheel but you can see roadway sinking.
You can hear the flex. On the open water shot you can hear popping
@@Syrnian That was the key. Thank you. (Why have I never figured out the arrow keys did that??)
I took my sons for a drive over that bridge, pretty scenic area. We weren’t driving anything like these vehicles, but we did drive some gravel backroads to get there. Wouldn’t want to be driving behind that mammoth load. Thanks for the interesting video.
Thank you for watching.
I really did expect the bridge to flex, I did not notice anything visually. Either way it was a very dangerous crossing.
I Was An Equipment Operator Building That Bridge In 1989.
Oh neat! You guys did good....it held up! I bet with plenty of room to spare too.
Wow, you can see the bridge flexing quite a bit.
Starting at 6:00 watch the white line on the right side. Around 6:20 and as the camera pans out you can see how flat the bridge gets. This is in response to all the comments below that said they couldn't see it. Hope this helps
Incredible! Those guys that drive those oversize loads have some serious balls! Its cool how the guy in the back steers the trailer and they have an additional truck to help push it along.
What the hell did I just spend 8 minutes of my life staring at?
Don't you like trucks? Cargo rigs? Bridges engineering?
Nature, Motion, Quantum Field Theory, Infrastructure, Tesla, Cheese
A couple of trucks crossing a bridge, chivone21.
You watched it at regular speed🤣
@@thrasherbuddy1 Actually, I did too! Haha. Most times I speed up the playtime for podcasts. Ha
And get this, this was the first "heavy" load to test the new Hoover Dam Bypass Bridge at around 900 feet above the Colorado River! It would've been neat to see how much deflection there was while crossing that. Not as dramatic as here, but still, I would've liked to have seen it.
Myself as well. I have photos all through the building of that bridge. It would have been nest to have video from on top as well as from the dam.
Yes, right.
ok i saw it after following the link in the description, looks like it functioned exactly as designed too, strong enough to bend without breaking, thanks!
thats INSANE.. I see the bridge flatten out. very scary, hope the structure is solid on that whole section. big trouble if not. pucker factor is way up. nice video thanks for sharing!
You can easily see the bridge "flex", by watching the K-Barrier Siderail as the load passes over the top of the structural arch!
Mike Hazelwood The what? Got a time stamp on that?
When San Francisco had an anniversary party on (75th) the Golden Gate bridge it had so many pedestrians, the bridge roadway arch had flexed flat. They had to close any more people on the bridge. .It had exceeded the weight limit and could have possibly had a failure ( collapse) of the roadway. So as in the Conan movie: What is stronger, flesh or steel?!!
Yes, I remember seeing the video of the 50th anniversary celebration in 1987 where the load of people on the bridge actually flattened out the upward arch of the span. It was a good thing they were keeping an eye on it and closed it to more people.
@@espeescotty at my old university there was a big rock concert on the top of a 3 story parking garage, at some point the crowd was dancing and jumping to the music and the structure started shaking, people freaked out and they cancelled the concert
It’s all about the cars moving! Usually a bridge only has to have the extra strength for a few moments. I remember that Same thing I’m sf I think... I was riding my bike planning to cross and they shut it down! They said the bride could hold that much weight but since it would be the whole day they knew it would stress the bridge. I thought that was so cool!
I was in New York State on an Interstate Highway. They stopped all traffic, and had us tune to an AM Station. They were bringing a heavy piece of equipment across the bridge, but I didn’t understand why all these vehicles were parked on the bridge. Then the Load came across in headed towards me, going in the opposite direction. I’m guessing the vehicles were being used as a ballast. It was a huge truck like this one. It was equipment for a power plant, and that was just part of the equipment. BTW One of the scariest bridges I’ve been across, because you don’t even see the bottom, under the bridge. The trees looked like toys for a train set.
Amazing how much the railing deforms when the load is in the middle of the bridge - presumably this did not permanently deform the suspension cables. Loved the hawk fly by around 4:45.
Wow, I would have been so nervous crossing with that load...
Or after that load!
Hats off to the drivers!! Great job!!🤗
I've crossed that bridge many times and am glad I hadn't seen this video. Next time I'm there I'm going to take a closer look at the bridge and not the lake. Amazing that the concrete flexed that much. There must be cracks.
and that my friends is the reason they have bridge laws and heavy haulers to understand them. You don't just go out and buy a truck and do this. There is a lot of engineering that goes into spec'ing the truck for it's use. Getting the right drive train is the key. A regular over the road truck is not capable of doing these tasks. You have to have an engine, transmission, clutch and axles that will sustain the torque when starting from a dead stop as well as having suspension and tires to handle the weight. KW is by far the best truck and company for building these trucks. Some of these trucks take a year to get delivered since the components are built for the specific truck and customer. And yes, there is a huge pucker factor when crossing bridges. I totally enjoyed this video. My hat's off to the engineers and contractors of the roadways as well.
Awesome!
And the Americans have NO IDEA of how to do it. This is so amateurish on so many levels it's hilarious to watch. You want transport engineering done well and safely, go to Western Australia.
What is amateurish about it?
It looks stock, right off the lot to me.
@@carlsaganlives6086 you do know that the body aint whats doing the hauling? Its the unseen drivetrain that has upgrades
Aaaand the next car, a Lada, sent the bridge into the water, killing a school of lake trout. so tragic.
I enjoyed the guy steering in the back ... "do'n the Princess wave"
I've been on railroad bridges when heavy trains crossed. It's pretty wild to feel the bridge move under you and see huge girders flexing under the load.
Thats a nice modern bridge. I wish we had that bridge right now in West Seattle. Our massive bridge is actually crumbling and closed to the general public for major repair work. That 285 ton load the trucker is so carefully pulling would probably cause our poor old West Seattle bridge to collapse into the Nisqually river below. Nice driving guys!
Well I guess thats one way to make sure someone did their job in the bridge engineering department.
The co. I was with had their own engineer to go an check out then , submit it to the highway department and see if they'll approve the route you have chosen , if not you might have to CALL Superman. 😂😁🇺🇸
Good thing I didn't help weld that bridge
@@chuckmiller4091 hnń4 tnn t
Even on this normally speed version of the video you can clearly see the bridge flexing under that load. Wow!!!
Thank you. Yes, it was really neat watching these KW's handle this load.
Great video. I’ve seen some very long and very heavy rigs being hauled when I was a driver. TSMFS
To save strain and wear on the motor and transmission and to decrease that litre-per-meter figure; Just flatten out the hills you are climbing. Genius!
Elect me Dicktator and I will redesign our entire highway system so the roads are downhill both ways! Imagine the fuel savings....................Also, I will give away free Harleys to every American! Piss on the ObamaPhone; You want a BobHarley! Remember, BOB2020!
And yes, I will definitely be grabbing some pussy; not just mentioning it in a offhand remark.
Hahaha! Now that’s thinking outside the box... the hell with those laws of physics; just load the wagon until ya smash ‘em! 👍
Skip between 5:44 and 6:09 and you will notice the difference in the walls.
CFRF13 yessss
Whoa! Thank you for this. I did not notice how much when i watched the first time. Saw your comment and tried it.
Much obliged.
Well done!
Excellent positioning to show the load deforming the bridge.
Glad he was centered to distribute the load evenly.
Nicely done!! Great video!! Yes sure can see the bridge flatten out.
Thanks for watching and the comment.
Well, it's a good thing the bridge has some flex in it, so it isn't likely to get stress fractures as easily. Still, one truck doing it to that extent is pretty crazy.
The miracle of steel...
No, I meant the balls those drivers had.
Miracle implies there was some kind of magic, this wasn't magic, it was a lot of hard work by engineers to design and built that bridge and development of the materials.
WootTootZoot - WOW!! The commenter was just pointing a moment of ‘aaww’ in amazement of steel and what it’s capable of. No need to be condescending about anyone’s amazement of anything. Sheeesh!!!
Now that the bridge has been load tested I we can open it to the public.
What was the load?
Great video.
I wounder how long it took to deliver their load from collection to destination.
where they delivering the stargate?
It took me a moment to realize what you meant. I've heard of the show but never seen it, funny stuff man lol.
This video stops before the shit really hits the fan, when my mother-in-law tries to cross.
Awesome vid, thanks for uploading it (and even moreso for uploading it without music!)
You're welcome and thanks for watching. Glad you liked it.
Be interesting to see the stress on each individual suspension cable.
Riveting... is what held that bridge together...
I watched a frog video once, I didn't want to watch a frog video, but my friend said it was great, so i watched it. It was ribbiting!
Michael William Dale Francis and riveting held the titanic together as well
Jayden O'Farrell no man. They used scotch tape and super glue on that one.
Actually I’m pretty sure it’s duck tape
Nope its all bolted
My wifes hula hoop has arrived.
LMAO!
savage
Put that video up.
Chubby chaser
What's it worth to you for me to keep my mouth shut to your wife? lol.
Hey Rob, I just checked out Mammoet's website and saw the recovery vid of the fuel truck in B.C. (over 1000 feet deep!) and the recovery of a barge loaded with sulfuric acid from the Rhine River in Germany. As I've said before, they sure have their stuff in gear for the hard jobs. Thanks for the tip and I'm glad you're liking what you're seeing. I'll look at the others when I have time.
Fantastic video , great cinematic camera work . Thanks for posting
This video was almost as exciting as the one i just watched about paint drying. Next im going to watch a video of old people sitting on park benches. Fuck i need to get a life!
Not saying it didn't flex but I could not see it.
Watch the link in the description. It shows it better than I could.
@@espeescotty Yes, I saw it that time. I have been over that bridge a few times. Beautiful area. Thanks for telling me about the link. Cheers!!!!!!
You're welcome. Thanks for watching.
Reminds me of a Calvin and Hobbes strip. The family is driving along and go over a bridge. Calvin asks Dad how they know what the load limit on bridges is. He replies that they drive bigger and bigger trucks over it until the bridge breaks, then weigh the last truck and rebuild the bridge.
I LOVED watching the deflection, as viewed at the railings on the sides. Judging from those, it looked like considerably less than a foot of deflection. Estimating a 48-foot span, the max allowable deflection would have been 1/240th of that, or 0.2 feet = 2.4 inches. That looked about right. The height of the railing staves was probably 24", and it looked like about 1/10th of each stave was the max that it moved down.
BTW, the load did not put a permanent flat spot on the bridge. It "un-deflected" as soon as the load was removed.
Long, long, long ago, I worked in a consulting engineering firm designing the I-55/I-70/I-44 bridge over the Mississippi River at St Louis. I was very young then, and new to it all. And it was the only bridge I ever worked on though I worked in engineering for over 40 years. My bosses told me that ALL US bridges at that time were designed with a Safety Factor of EIGHT. The steel used is ASTM A-36 structural steel with a rating of 66,000 psi. This means that the steel USED is designed as if the rating is 1/8 of that - or about 8,250 maximum stress on the steel.
So, basically, with a S.F. of 8.0, the load for 285 tons (570,000 pounds) it is as if a NORMAL building-type structure designed for 18,000 psi (a S.F. of 3.67) was seeing a load of 130 tons. A big deal and not a big deal.
Moving big stuff like that is ass-kicking. I once had one of my brand-new double-width 120" industrial fan rotors get destroyed, clipping the underside of a bridge that the truck driver shouldn't have been going under. My company was not pleased!
Would have been great if the guy didn't have to move the camera every 5 seconds.
See the stabilized & sped-up video which he linked in the description.
Wow that camera has one hell of a zoom on it?Great video.
Thank you. I have just upgraded to an HD camera, now I just need more opportunities to shoot awesome moves like this.
Nice job on that clip...setting up for the staight on and then the pan. Well done. Thanks for posting.
Thanks. You can tell I'm no engineer, but I do enjoy watching what they've figured out.
I think I need a lie down after all that excitement
Absolutely spent, exhausted.
It's been 4 years since, did you manage to recover?
Pretty cool. You can’t see the road flex, you have to watch the railings and you will see it. I used to have a roommate who worked for a company that arranged for escort vehicles for stuff like this. I kept hearing “do you need a pole?” (You can see one on the lead vehicle) and wondered how you could do a road survey for something this size to ensure the roads could handle the weight.
Thanks for that! That was a white knuckle rider for me....such respect for those load movers!
To make it easier to see just switch from 6:59 to 7:28 and go back and forth between those times. You can see the bridge buckle if you skip between those times.
Thanks for the tip! I couldn't see anything until I went from one time to the other (as you suggested). Making an immediate A/B comparison makes the deflection show up.
285 tons? Not often you see a moving object heavier than a Maus Tank.
Video starts at 5:00
Thank you
Pats bridge engineer on back “Well done mate”
That's cool to see how the concrete starts to flatten out. thanks for the video
Thank you for watching. I'm glad you liked it!
It would be interesting to play the video in 10X speed to better perceive the bridge's deflection.
Yes, I totally agree. If TH-cam ever offers a speed up feature I'd repost it to show the effect better. I cant figure out how to do it on other editing software.
Just take the position marker and slide it around. You can see how much the bridge moves. Kinda crazy.
espeescotty News flash lol if you go in the cog wheel you can go up to 2x speed, not much but better
espeescotty You can double the playback speed with the Settings (gear) icon lower right.
Marc Brooks I ninja'd you
:3
Wow is it just me or does anyone else see a moving ripple in the walls of the bridge as the truck passed over
You are correct....you definitely saw that.
I saw the steel flexing a lot. Surely the driver felt it.
@@espeescotty SLOW SPEED, COULD SEE FLEX RELATIVE TO MEDIUM BOULDER, BETWEEN WIDEST TIRES AND BRIDGE RAILING!!
I saw this going on the frontage roads in downtown SLC and ife been wondering forever what it was
Fantastic video man..!! and what made it even better for me was the fact that it was a couple of real Kenworth's doing what they do best...
The heck with the bridge. Did you see that huge bird at 4:41?
Paul Patrie That was a Washington mosquito you saw. They get big enough to catch sheep and drain all the blood from them.
Brian Garrow in alaska mosquitos have tiny little landing lights
In Australia, we use them for domestic flights....
In America, we elect them to Congress, the House, the Senate, and courtrooms... and pay them. 😂🤣
Turkey Vulture. The bird you hear repeatedly in the background is a Canyon Wren.
Where's the flat spot?
The road looked fine.
It was the arch of the bridge that got flat, right in the middle.
The camera kept moving, it was difficult to see it move but the link you provided in the description helped. Pretty interesting watching the bridge do its job.
At 5:50 to 6:00 you can see a flat spot forming and following the load. Look at the bottom edge of the side railing (right) curved line of the railing portion is flattening and returns to flowing arc as load passes.
literally watched the bridge flatten with the bearing weight
+John Westfaul
Where? I can't see it. Watched it 3 times.
+Nad Fink Read the description of the video and then click on the link.
+Nad Fink
Simple.Start at 5:30 watch the right side of the bridge while pressing the right arrow button.
+eSPeeScotty
WOAH! Awesome!
+John Westfaul i seen it flatten. i wonder if it damage the bridge?
Prescision Heavy Haul of Phoenix did the move.
If your having trouble seeing the bridge flatten, look at the shadow being cast on the bridge. If you watch you can see the deck go flat as the tractor progresses. I wonder if the bridge is worse off now, or its designed to do that
Is it mean that I kind of want to see this thing meet the 11-foot-8 bridge?
That really says something about the load this bridge carried that day. That whole set up stretched 225 feet, and it still put a noticeable flat spot in the bridge! That said, I really doubt that the engineers that crunched the numbers and inspected the bridge before the move were sweating very much. If it were very close to the limit, I suspect they would've changed the route or the trailer requirements.
I bet the guy running the tiny steering wheel makes the most...
I bet the guy running the tiny steering wheel has been in the trade for over 40 years and has done his fair share of fucking hard work. To be steering a operation that big, you've got to have some serious quals.
mitchsfarm
No you don't you stupid fucking dumb ass. It takes about 5 minutes training.
haha i didnt know you knew how to drive a truck? oh wait i doubt you do
***** I can appreciate your information but I already understand that. I made the comment simply as a joke... not as an insult to the guy running the little steering wheel as I know he has earned his position and I couldn't do any better.
How much?
It’s amazing how that it doesn’t look like it would weigh that much
It takes skill and nerves of steel to do that job. I drive truck and pull a flatbed but that doesn't even compare to something like this. I give these drivers and pilots all the respect.
I'm surprised there is no flatearther arguing in the comments that it's refraction those flatheads don't like anything that is related to some sort of curve.
They just mad their girlfriend is flat.
Flat earthers are living in you head rent free , evict them before your mad
thats a trail king trailer...i mightve helped build that1
you can tell tk by the triangle cutouts
IIRC, it is standard practice in Europe to test load a bridge to some multiple of designed load and measure deflections compared to design. The designer engineer is standing on the structure when the portable weights (tanks) roll onto the structure. Would be interesting to watch.
There is a video of a highway bus crossing a small rural suspension bridge marked for six tons. The bridge deflected more than five feet but remained standing after the ordeal. Some old truss bridges simply collapse under this abuse.
If you watch behind the right lane there’s a boulder sticking out just above the road line. If you use that as a gauge you can see where the road flattens. At the beginning of the video you can see only half of the Boulder but, if you wait until the truck is at its peak you can see all of the Boulder plus ground beneath it.
I’m not buying that the load was 570,000 lbs.
The rig was almost 300 feet long, id say it was pretty close the the specified weight.
I agree Randy. First off not enough tandems to be moving the alleged 285 tons. I see mega moves all the time where I live because of massive production plants like Exxon, Chevron, Shell, and others here locally. The companies Supor, and Mammoet do these moves with special haul trailers that have at least 64 wheels on them. That kind of weight would also require more than one pulling, and one pushing. That load may have weighed 285K but not tons
285k I'd say. Not nearly enough in suspension and tires for 285 tons. Not even close
I just didn’t see it 😐
Sure can. Thanks for posting. Very interesting.
You can see the flattening really well on this because the lens forshortening effect of the camera at high magnification.
The same effect can be used artistically in photography when looking down say a railroad track or road with undulations in it. With a super zoom lens at high magnification, the undulations all look really steep and close together but when you zoom out they look normal again. This is because the light waves get compressed.