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Old 03-30-2006, 09:40 PM   #21
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1959 26' Overlander
Putnam , Connecticut
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Prehaps a good road bad road forum would be helpful. The mapping software only gives me what they are fixing, not what they are not fixing. Could have each state or area of the country or major roads. I'ld rather spend an extra hour driving around these roads than over them or waiting in traffic at construction sites. You would think the feds would have a website covering each interstate and its' condition by mile.
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Old 03-30-2006, 10:45 PM   #22
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Anna , Illinois
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Rough ride on some concrete freeways

"Porposing" or "Freeway Hop" was a constant towing companion with the tow vehicle that preceeded my current Suburban ('95 K1500 Z71 Chevrolet Club Cab pickup). It was particularly severe with the Overlander in tow -- I suspect that it had something to do with the relationship between the distance from the tow vehicle's rear axle to the coach's axle; and was compounded by the pickup's overly stiff off-road springs (part of the Z71 package). The problem virtually disappeared when I switched to the Suburban -- even on the strech of US-151 between Dubuque, Iowa and Platteville, Wisconsin that had been my strech of highway to avoid if possible when towing from my home near Platteville. The tow vehicle that preceeded the Chevrolet pickup also didn't have problems with that stretch of highway -- 1984 AMC Grand Wagoneer (the old-full-sized vinyl wood panel wagon).

During the past two or three years, I have been experiencing something that can be even more disconcerting than the "porposing" or "Freeway Hop". While I have encountered it in areas outside of Illinois, there have been several highways where I have noticed the issue of "rutted driving lanes" for lack of a better description. One that I generally avoid is on Interstate 57 in Illinois -- several stretches between Arcola, Illinois and Mt. Vernon, Illinois are blacktop that has ruts that can set up a very unpleasant harmonic between the tow vehicle and trailer -- since the tow vehicle and trailer tend to track differently through the ruts, the result is what I can best describe as a constant wiggle between the tow vehicle and trailer. The first time that I experienced this, it was after dark and I thought that I was driving into a severe storm but the sensation was eliminated as soon as the road surface returned to concrete. Since I travel this I-57 section frequently both with and without one of my coaches, I have had the opportunity to observe that the ruts are actually quite visible over some stretches. Unless I am terribly pressed for time, I usually avoid these stretches by following US-45 and IL-37 between Arcola and Mt. Vernon.

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1964 Overlander International
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Old 03-31-2006, 12:30 AM   #23
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The joint bumps on old concrete highways particularly affect 2500 level trucks & trailers. I26 from Asheville,N.C. to Spartanburg, S.C. and I59 from Chattanooga to Birmingham are two I am aware of. Only thing I have been able to do is move into the passing lane and ride it out at about 50 mph. People know what is going on and the overtake-pass pattern just reverts from left to right lane.

Kansas dept of highways came out five or six years ago and said the wear rates on our highways was off by approx 50% due to increased truck traffic.The tremendous growth in the US economy since 1990, the highway bill that allowed 53 ft trailers, etc. is rapidly deteriorating our highway system.

We need higher taxes on trucks(activity based accounting) to put the burden where it belongs. It is the 44,00 lbs loads + truck weight that beat up the highway, not my 2700 lb Camry. Now my 14000lb truck + trailer may be a different story.

14000lbs/8tires = 1750lbs per tire. 44,000lbs+20,000lbs tractor + 10,000lbs trailer = 74,000lbs/18tires = 4111lbs per tire. Numbers are just approx. but, I think you get the idea. I don't travel anywhere near 200,000 miles per year either.
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Old 03-31-2006, 08:38 AM   #24
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Originally Posted by Inland RV Center, In
Please visit southern California. Or ask anyone that tows a travel trailer on it.

You will change your opinion, faster than a speeding bullet. ...
Agree with Guru Andy. If you want a great test location, try the 405 on the southbound side just north of the Ventura Freeway. Jeez Louise!! It's so bad my TV (F250 diesel) hops along even without a trailer.

60 mph is the worst, so I opt to plug in the afterburners and do the 85+ !

I do agree that being light on the front end of the TV will worsen the problem.
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Old 03-31-2006, 09:35 AM   #25
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The problem is an oscillation induced by the rise/fall of the concrete. When the frequency of this rise/fall matches the vehicle oscillations induced by prior rise/falls, the amplitude will rise until it's darned uncomfortable. Soft suspension or low tire pressure can aggravate this because they allow the amplitude to increase futher, but there are many variables. Changing speed, even +/- 5 mph will improve things. New shocks, changing tire pressure, loading, and weight distribution hitch setup will affect the natural resonant frequency and can stop the undesirable feedback loop. Remember the Tacoma Narrows bridge disaster.
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Old 03-31-2006, 07:42 PM   #26
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I-81 from Winchester, VA through Pennsylvania is horrible as is I-64 from Hampton VA to Williamsburg, VA. You can get into a Harmonic situation where the frequency of your rig is such that the motion becomes increasingly dangerous or for some on the ladies very uncomfortable. Slowing down changes this bouncing frequency but does not totally eliminate it, taking a different route may. I have included the I-81 in my route to International this year, because its still a better choice in my opinon that I-95. Going west with the coast to coast caravan out of Mass.
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Old 04-01-2006, 07:48 AM   #27
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If you're headed for Northern Maine this summer - i.e. Acadia and the Maritimes beyond - the concrete section of I-95 from about Freeport to Augusta will drive you nuts with a trailer in tow. The solution, if you don't mind a slightly longer drive, and you don't want to visit Freeport, Portland, or the nearby coastal areas, is to take the turnpike through Lewiston/Auburn. I'll concede that my TV is stiffly sprung - but I seldom have any real problems elsewhere.

2003 GMC 3500 D/A, CC, LB, 4x4 and 2000 Airstream Excella 30. WBCCI 7074
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