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Old January 1st, 2011, 12:42 AM   #6301
Interstate275Fla
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Quote:
Originally Posted by ChrisZwolle View Post
Very unusual looking interchange!

On the cross street going under the highway traffic shifts to the left side of the road in order to accommodate left turning traffic transitioning from the cross street to the highway in the opposite direction, as opposed to traffic having to cross opposing traffic on the cross street in order to enter the highway (and the installed traffic signals with left turn protection). This may sound like a great interchange design idea but it may be a little confusing.

Will this design and construction of future interstate highway interchanges eventually spread across the rest of the country from Missouri? I think the Missouri DOT did a great job in designing this interchange for safety reasons but I am not sure if the Florida DOT will incorporate a Missouri-style design when future interstate highway interchanges are reconstructed. After all, the Florida DOT recently reconstructed the interchange north of Tampa on Interstate 75 at Exit 279 (FL 54/CR 54) which widened the cross road (FL 54) and added a third lane on Interstate 75 in each direction for eventual widening from the Interstate 75/275 interchange (Exit 274) to the Florida Turnpike near Wildwood (Exit 320).
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Old January 1st, 2011, 04:10 AM   #6302
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Quote:
Originally Posted by Maxx☢Power View Post
What's up with the two arrows inside (between) the solid yellow lines at the bottom of the picture? It kind of looks like there are dashed lines on both sides inside the solid ones, but you have to cross the solid line to get in there in the first place..
That is a shared center left-turn lane. Those are fairly common in the USA, especially on major streets with lots of closely and/or unevenly-spaced commercial driveways.

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Old January 1st, 2011, 04:27 AM   #6303
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Originally Posted by Maxx☢Power View Post
I've seen those on other US 2+2 roads, and thinking about it they look exactly the same.. I don't know why I thought this was different, maybe because it looks a little out of place right next to that concrete island..
Well, after all, they do have to start and end them somewhere....



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Old January 1st, 2011, 07:42 AM   #6304
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Nice video. Thanks.

In terms of speed limits they definitely should be raised to at least 70-75 mph (on interstate highways) because my normal speed on interstates is always 9 mph above speed limit (usually 74 mph in a 65 mph speed limit zone). And it seems like police understand that and don't care as long as you are not going 10 mph over. A few days ago I passed sheriff's car at 74 mph and kept driving (when everyone else slowed down) and he didn't care.
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Old January 1st, 2011, 07:45 AM   #6305
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Quote:
Originally Posted by Maxx☢Power View Post
I've seen those on other US 2+2 roads, and thinking about it they look exactly the same.. I don't know why I thought this was different, maybe because it looks a little out of place right next to that concrete island..
They're on 1x1 roads here, too.

I have to agree--these new Missouri diamond interchanges are a great new innovation in terms of traffic safety, but in more urban areas with higher pedestrian counts I wonder about the multi-modality... still, for most areas, a very minor scruple.
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Old January 1st, 2011, 06:16 PM   #6306
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They have them in the UK too, and they look like this

------------------------
///////////////////////////
------------------------
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Old January 2nd, 2011, 03:48 AM   #6307
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Quote:
Originally Posted by DanielFigFoz View Post
They have them in the UK too, and they look like this

------------------------
///////////////////////////
------------------------
That sort of marking in the US would indicate that you're not supposed to drive there, with the diagonal stripes indicating which side you're supposed to stay on, meaning always the right side, so they'd be going the opposite direction on a two-way road:

___________
\\\\\\\\\\\\\\\

but in a V shape on a one-way road:
________________
>>>>>>>>>>>>>>

with no empty space between the solid lines and the diagonal stripes.
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Old January 2nd, 2011, 04:14 AM   #6308
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double post
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Old January 2nd, 2011, 06:30 AM   #6309
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Originally Posted by Danielk2 View Post
Nice vid. What software do you use to make those vids?
Danielk2, I use Apple's Final Cut Pro software. That is one of the best software investments I've ever made.

Snowman159, thank you! I actually set up my tripod on the passenger side floorboard and put down an all black t-shirt on the dashboard to reduce the glare and visibility issues. These last couple of DC videos didn't turn out so hot quality wise as there was a lot of salt and brine still on the highway.
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Old January 2nd, 2011, 03:31 PM   #6310
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Quote:
Originally Posted by DanielFigFoz View Post
They have them in the UK too, and they look like this

------------------------
///////////////////////////
------------------------
Quote:
Originally Posted by nerdly_dood View Post
That sort of marking in the US would indicate that you're not supposed to drive there, with the diagonal stripes indicating which side you're supposed to stay on, meaning always the right side, so they'd be going the opposite direction on a two-way road: <snip>
with no empty space between the solid lines and the diagonal stripes.
Note the broken lines on Daniel's ASCII art - we have solid hatched areas, including with V shapes on one-way roads and you 'MUST NOT' (illegal if you do) cross solid hatching other than to avoid a collision or something. Broken lines are just plain old 'should not' - which means that you can, but we'd rather you didn't.

However, they aren't turn lanes - turning where there's a hatched area in the middle of the road is done like this - the hatched area sort of ends and becomes a right-turn lane.

Hatched areas in the middle of roads in the UK are not the same as shared centre left turn lanes in the US - there are similarities, but they are rather different things.
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Old January 2nd, 2011, 03:53 PM   #6311
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Cool 1954 film by GM to promote building the Interstate system. Part 2 has some pre-Interstate freeway footage from the BQE and Gowanus in New York, The Loge and I-94 in Detroit, the NJ Turnpike. It also has footage from Chicago, San Francisco, and Pittsburgh






Last edited by urbanlover; January 2nd, 2011 at 11:47 PM.
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Old January 2nd, 2011, 11:44 PM   #6312
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Quote:
Originally Posted by sotonsi View Post
Note the broken lines on Daniel's ASCII art - we have solid hatched areas, including with V shapes on one-way roads and you 'MUST NOT' (illegal if you do) cross solid hatching other than to avoid a collision or something. Broken lines are just plain old 'should not' - which means that you can, but we'd rather you didn't.

However, they aren't turn lanes - turning where there's a hatched area in the middle of the road is done like this - the hatched area sort of ends and becomes a right-turn lane.

Hatched areas in the middle of roads in the UK are not the same as shared centre left turn lanes in the US - there are similarities, but they are rather different things.
In the States what we're taught is this:
- Double solid line may not be crossed.
- Single solid line should not be crossed (only to pull over a disabled vehicle, or if you're waiting at an intersection and you're ABSOLUTELY SURE it's safe to change lanes)
- Single dashed line may be crossed
- Double line with one solid and one dashed line may be crossed from the side with the dashed line, may not be crossed from the side with the solid line (Except with the center turn lane - in this case it's reversed. It would seem confusing at first - I think the Canadian system is better in this case since they keep true to that rule and use the dashed line on the outer edge with the solid line inside that)
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Old January 2nd, 2011, 11:54 PM   #6313
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Indeed here;

-------
////////
-------

is different too

______________
///////////////////
_____________
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Old January 3rd, 2011, 05:58 AM   #6314
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Quote:
Originally Posted by nerdly_dood View Post
In the States what we're taught is this:
- Double solid line may not be crossed.
- Single solid line should not be crossed (only to pull over a disabled vehicle, or if you're waiting at an intersection and you're ABSOLUTELY SURE it's safe to change lanes)
- Single dashed line may be crossed
- Double line with one solid and one dashed line may be crossed from the side with the dashed line, may not be crossed from the side with the solid line (Except with the center turn lane - in this case it's reversed. It would seem confusing at first - I think the Canadian system is better in this case since they keep true to that rule and use the dashed line on the outer edge with the solid line inside that)
The problem with the latter is that that is also the line symbolism that means 'legal passing zone' and someone not paying full attention will use that center left turn lane to try to pass someone in the 'usual' manner, creating a serious hazard. There is a strong wariness in the USA regarding anything that might even slightly resemble the old 'suicide' shared passing lane - they were commonly used throughout the USA from the 1930s into the 1960s or early 1970s and MANY, MANY people died using them.

Mike
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Old January 3rd, 2011, 11:59 PM   #6315
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Found a nice map about general speed limits. Texas is quite a cluster**** ranging between 65 and 80 mph.

I also remember going 80 in Utah last year.
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Old January 4th, 2011, 01:46 AM   #6316
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Quote:
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Found a nice map about general speed limits. Texas is quite a cluster**** ranging between 65 and 80 mph.

I also remember going 80 in Utah last year.
Hopefully Ohio, Illinois, Wisconsin, and Oregon will go to 70 this year. I believe there's a push in all those state legislatures to raise the limit.
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Old January 4th, 2011, 02:03 AM   #6317
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Hopefully Ohio, Illinois, Wisconsin, and Oregon will go to 70 this year. I believe there's a push in all those state legislatures to raise the limit.
Forget 70 , we should make it 100 in rural areas across the country.
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Old January 4th, 2011, 02:14 AM   #6318
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Forget 70 , we should make it 100 in rural areas across the country.
I'm being politically realistic here.
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Old January 4th, 2011, 03:11 AM   #6319
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Quote:
Originally Posted by KingNick View Post

Found a nice map about general speed limits. Texas is quite a cluster**** ranging between 65 and 80 mph.

I also remember going 80 in Utah last year.
TX is no diffrent than any other state if you were to break down max speed limits at country level you'd see lower speeds around see major cities


Quote:
Originally Posted by Rail Claimore View Post
Hopefully Ohio, Illinois, Wisconsin, and Oregon will go to 70 this year. I believe there's a push in all those state legislatures to raise the limit.
Ohio just raised the limit to 70 on the turnpike
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Old January 4th, 2011, 03:19 AM   #6320
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I'm being politically realistic here.
True but its always nice to dream....
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