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Open Roads Forum  >  Fifth-Wheels

 > 75 Speed Limit - How Fast

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Me Again

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Posted: 09/06/20 08:51pm Link  |  Quote  |  Print  |  Notify Moderator

fj12ryder wrote:

There's some dumb intersections out there, but the ones that are the worst are the ones where incoming traffic merges from the left.


So you have driven in the Seattle area?


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rhagfo

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Posted: 09/06/20 11:05pm Link  |  Quote  |  Print  |  Notify Moderator

fj12ryder wrote:

rhagfo wrote:

Very seldom that semis run at their speed limit, now days the limits are 65 autos, 60 trucks most semis run between 65 and 70, autos 65 and 75.
Running 20 mph below the flow of traffic in the right lane, basically setup a rolling road block.
Rolling roadblock? That's what that passing lane is for. If people would drive like they should, i.e. move over to pass and then move back over to their original lane, it wouldn't be an issue, but instead you have people that pull into the right lane and just sit there, even when they could get back over. There's your rolling roadblock.

Makes a person wonder how they keep the autobahns in Germany from being endless car wrecks, when you have people driving 100+mph and other people doing 60-70 mph. Oh yeah, they know how to drive.


Well when you consider about 90% of the interstate system is only two lanes in each direction, a rolling road block is a vehicle going significantly slower than the general flow of traffic forcing all to move to the left lane to get around them. If the volume of traffic is higher than moderate many will have a difficult time fitting into the left lane.


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rhagfo

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Posted: 09/06/20 11:33pm Link  |  Quote  |  Print  |  Notify Moderator

Me Again wrote:

fj12ryder wrote:

There's some dumb intersections out there, but the ones that are the worst are the ones where incoming traffic merges from the left.


So you have driven in the Seattle area?


What do you mean Chris? The 520 and I90 on ramps to I5? Dealt with those for years, back in the 80’s and 90’s, now days I avoid driving through Seattle at all cost. Rather use 405 thru Bellevue. Last time I drove there was 12/31/2018 going to Snohomish to buy our 2016 Ram.
Last time needed to get north of Seattle/Everett, I turned left at Olympia coming north on I5, then took 101 north to Port Townsend, then ferry to Coopville.

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Posted: 09/07/20 01:59am Link  |  Quote  |  Print  |  Notify Moderator

since this was a thread on fifth wheel speed, I think one issue that has been overlooked is ambient temperature. Pulling a trailer through California or NM right now adds quite a heat load to tires, and my understanding is heat is a prime factor in tires coming apart. TPMS systems tell you when air is low but not how hot your tire is. I wish they did both...

My little motorhome has door stickers saying 62 pounds in all six tires. Yet the tires are rated to 80 pounds. I put 70 pounds in each tire just to be safe and super high temps are not an issue on East Coast normally.
Is there a common sense rule where if it's over 90 outside maybe we should not do 75mph? Not that I would anyway...

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Posted: 09/07/20 05:46am Link  |  Quote  |  Print  |  Notify Moderator

daugen wrote:

since this was a thread on fifth wheel speed, I think one issue that has been overlooked is ambient temperature. Pulling a trailer through California or NM right now adds quite a heat load to tires, and my understanding is heat is a prime factor in tires coming apart. TPMS systems tell you when air is low but not how hot your tire is. I wish they did both...

My little motorhome has door stickers saying 62 pounds in all six tires. Yet the tires are rated to 80 pounds. I put 70 pounds in each tire just to be safe and super high temps are not an issue on East Coast normally.
Is there a common sense rule where if it's over 90 outside maybe we should not do 75mph? Not that I would anyway...


Which TPMS do you use. Our TST-507-RV-6-C gives both the tire pressure and temperature....it is an after market system.

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Posted: 09/07/20 06:06am Link  |  Quote  |  Print  |  Notify Moderator

good to know, the two aftermarket ones I previously bought did not have temp thanks

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Posted: 09/07/20 06:06am Link  |  Quote  |  Print  |  Notify Moderator

fj12ryder wrote:

rhagfo wrote:

Very seldom that semis run at their speed limit, now days the limits are 65 autos, 60 trucks most semis run between 65 and 70, autos 65 and 75.
Running 20 mph below the flow of traffic in the right lane, basically setup a rolling road block.
Rolling roadblock? That's what that passing lane is for. If people would drive like they should, i.e. move over to pass and then move back over to their original lane, it wouldn't be an issue, but instead you have people that pull into the right lane and just sit there, even when they could get back over. There's your rolling roadblock.

Makes a person wonder how they keep the autobahns in Germany from being endless car wrecks, when you have people driving 100+mph and other people doing 60-70 mph. Oh yeah, they know how to drive.


German drivers are more considerate than North American drivers. The also follow the rules better when driving the Autobahn to avoid the mass collisions.


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daugen

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Posted: 09/07/20 06:09am Link  |  Quote  |  Print  |  Notify Moderator

it was one of the greatest driving experiences I ever had going on the Autobahn. 99 percent of vehicles obeyed the laws and the whole concept of lane control was fully there. Funny that the fastest vehicles were the big BMW and Mercedes sedans, saw few Porsches driving fast. Maybe that has all changed. They do say when there are wrecks on that road, they are severe
I just wish I wasn't driving a rented Opel then that maxxed out at 95mph.

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Posted: 09/07/20 06:56am Link  |  Quote  |  Print  |  Notify Moderator

daugen wrote:

good to know, the two aftermarket ones I previously bought did not have temp thanks


I use a TT 500 (earlier version), on my 5’er. Tire temperature and pressure displayed. Drove I-90 across SD earlier this summer in 100-degree heat. No problems at 70 mph, load range E tires at 80 psi cold. “China bombs”, although new and rated at 75 [emoticon]

www.tiretraker.com/


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Posted: 09/07/20 01:09pm Link  |  Quote  |  Print  |  Notify Moderator

I set the cruse control for between 65 and 70


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