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Author Topic: ICC Intercounty Connector  (Read 248188 times)

Alps

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Re: ICC Intercounty Connector
« Reply #250 on: February 18, 2012, 10:42:26 PM »

It's been my experience that you can safely traverse a curve at 10 mph above the advisory speed, at least in any vehicle I've ever owned (which includes a Toyota Tacoma 4WD pickup and a 4WD Chevy S-10 Blazer.)
Correct, the advisory speeds are supposed to be posted 5-10 mph below design speed, and the design speed should apply to all vehicles. I've traveled Kamikaze Curve in NY at 70+ mph (not driving), but I wouldn't dare try it in my own car.

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Re: ICC Intercounty Connector
« Reply #251 on: February 19, 2012, 12:24:19 AM »

Some of the curves already are posted at 50.

Those are advisory plates, not the actual speed limit, which remains 55.

Having driven the ICC many times (from I-370 to I-95 and back) recently, those curves (at least when the pavement is dry) are perfectly safe at between 55 and 60 MPH. 

Meaning that the curves should have a speed limit of 55.
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Re: ICC Intercounty Connector
« Reply #252 on: February 19, 2012, 01:36:28 AM »

Correct, the advisory speeds are supposed to be posted 5-10 mph below design speed, and the design speed should apply to all vehicles. I've traveled Kamikaze Curve in NY at 70+ mph (not driving), but I wouldn't dare try it in my own car.

I've only done Kamikaze Curve once. It was southbound on I-81 and it was dark and traffic wasn't moving very fast at all, so I never got a chance to see what I could do in it.

I have done the through movement on NY 17 west, and the NY 17 east to I-81 south movement as well, but those don't really count, I know.

I'd think your car should corner pretty well.
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J N Winkler

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Re: ICC Intercounty Connector
« Reply #253 on: February 19, 2012, 04:14:37 AM »

Advisory speed is really a measure of expected driver discomfort due to variables like suspension response and side friction demand.  It is not meant to be an absolute ceiling on speed and it would be inappropriate to regard it as such.

Moreover, design speed is not a comprehensive measure of the driving experience with regard to speed, for two reasons.  First, the criteria that are attached to a particular design speed have changed in time, so you can't just lift the design speed value from the title sheet of the construction plans and frame an argument about the speedworthiness of a road around it.  You need to know more about the curvature and superelevation that is actually provided, plus some higher-level information about design consistency.

Second, the design speed does not measure how much slack has been incorporated into the design.  This is an important consideration because 10 over the design speed on a road designed for 60 MPH with plenty of slack (i.e., no curves near minimum curve radius and no superelevations near maximum) may very well be much more comfortable than 70 MPH on a road designed for 70 with no slack (many curves at or near minimum curve radius with maximum superelevation).

A rough way to calculate the slack provided in a particular design is to take superelevation and radius for all the horizontal curves that are provided, calculate the speed for each curve that corresponds to a consensus skidding value (say, 0.6g), and then subtract a suitable speed value from the calculated skidding speed for each curve.  The lowest such difference will be a measure of the slack provided in the design.

The "suitable speed value" you use for this calculation should be something that is established on a reasonably consistent basis.  This can be the speed limit, but if you want to compare two roads built in different periods and account for variations in setting speed limits across different roads, then you need to use current standards to compute an imputed design speed for each road involved in the comparison that has not been designed to those standards.

These considerations aside, the impression I receive from this thread so far is not only that Maryland SR 200 has a lower design speed than the Beltway outside the Bethesda Country Club, but also that the design has far less slack.  The telltale here is the provision of curve advisory speed signs as part of the initial construction.
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Re: ICC Intercounty Connector
« Reply #254 on: February 19, 2012, 02:23:57 PM »

I don't get all the fuss over the so-called "Kamikaze Curve" in Binghamton. There are plenty of curves on freeways in NYC which are far worse.
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Re: ICC Intercounty Connector
« Reply #255 on: February 19, 2012, 04:54:15 PM »

These considerations aside, the impression I receive from this thread so far is not only that Maryland SR 200 has a lower design speed than the Beltway outside the Bethesda Country Club, but also that the design has far less slack.  The telltale here is the provision of curve advisory speed signs as part of the initial construction.

That is a good summation of my perception of MD-200.

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Re: ICC Intercounty Connector
« Reply #256 on: February 20, 2012, 11:54:30 AM »

I don't get all the fuss over the so-called "Kamikaze Curve" in Binghamton. There are plenty of curves on freeways in NYC which are far worse.
I think it's the merge lanes.  The curve itself isn't bad; in fact, the DOT isn't going to be doing much of anything with the curve, mainly just changing the ramps so they don't have merge lanes on the curve.
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Re: ICC Intercounty Connector
« Reply #257 on: February 28, 2012, 12:49:39 PM »

Governor O'Malley reported via Twitter earlier today that the final ICC contract has been signed.
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Re: ICC Intercounty Connector
« Reply #258 on: February 29, 2012, 08:53:00 AM »

Governor O'Malley reported via Twitter earlier today that the final ICC contract has been signed.

Yep.  Same joint venture group that built Contract C got this business:

Maryland awards contract on last piece of ICC construction

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The contract was awarded to a joint venture of Shirley Contracting Co., Clark Construction Group, Facchina Construction Co. and Trumball Corp. The same joint venture built the 3.7-mile section of the ICC between U.S. Route 29 and I-95.
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Re: ICC Intercounty Connector
« Reply #259 on: March 19, 2012, 11:14:20 PM »

WTOP Radio: Traffic on the ICC: Looks can be deceiving

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Take a ride on the Intercounty Connector in Maryland during rush hour and drivers may wonder -- where is everybody?

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And while the road may seem wide open, Maryland Transportation officials say current traffic volumes are right on target.

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"Traffic overall is consistent with projections," says Kelly Melham, deputy director of communications for the Maryland Transportation Authority. "Approximately 20,000 vehicles on average on weekdays."
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Re: ICC Intercounty Connector
« Reply #260 on: March 22, 2012, 09:35:36 PM »

Baltimore Sun: State studies increasing speed limit on ICC - Officers have issued more than 1,200 tickets on the 16-mile toll road since November

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Lightly traveled and pothole-free, the newly opened Inter-County Connector is an invitation to speed, and that has become a sore spot with commuters.

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A review of the toll road's speed limit is under way and preliminary results and recommendations are expected in a month, said Doug Hutchinson, the Maryland Transportation Authority's chief engineer. The study will take into account the sharpness and bank of curves, sight distances and accident history on the road, formally known as Route 200.
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NJRoadfan

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Re: ICC Intercounty Connector
« Reply #261 on: March 22, 2012, 11:47:21 PM »

There were more then 3 cruisers parked running radar on that road the morning I was on it. The amount of speed traps were ridiculous on that road.
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Re: ICC Intercounty Connector
« Reply #262 on: March 23, 2012, 07:52:29 AM »

There were more then 3 cruisers parked running radar on that road the morning I was on it. The amount of speed traps were ridiculous on that road.

Every time I have driven Md. 200 end-to-end (which is pretty frequently), I have seen at least one MdTA Police unit either monitoring speeds or with a motorist stopped.
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Re: ICC Intercounty Connector
« Reply #263 on: March 23, 2012, 08:57:32 AM »

There were more then 3 cruisers parked running radar on that road the morning I was on it. The amount of speed traps were ridiculous on that road.

Every time I have driven Md. 200 end-to-end (which is pretty frequently), I have seen at least one MdTA Police unit either monitoring speeds or with a motorist stopped.

Nothing wrong with that ... otherwise you would have some jerks going 100+.

Also, visible enforcement is not a "speed trap".
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Re: ICC Intercounty Connector
« Reply #264 on: March 23, 2012, 09:18:04 AM »

Also, visible enforcement is not a "speed trap".
Agreed. A speed trap is when the speed limit is not obvious, due to being occluded or unposted. Hence the trap. If you're told clearly what the speed limit is, it's not a trap.
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cpzilliacus

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Re: ICC Intercounty Connector
« Reply #265 on: March 23, 2012, 09:30:40 AM »

There were more then 3 cruisers parked running radar on that road the morning I was on it. The amount of speed traps were ridiculous on that road.

Every time I have driven Md. 200 end-to-end (which is pretty frequently), I have seen at least one MdTA Police unit either monitoring speeds or with a motorist stopped.

Nothing wrong with that ... otherwise you would have some jerks going 100+.

I don't have a problem with strict speed limit enforcement by real police officers.

But the posted speed limit on Md. 200 could reasonably be 65 MPH (and probably be higher, though 65 is the statewide maximum), even though the road is relatively short.

I have a major problem with commuter tax revenue collection masquerading as automated speed limit enforcement (in the District of Columbia, not Maryland). 

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Also, visible enforcement is not a "speed trap".

Agreed. 
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Re: ICC Intercounty Connector
« Reply #266 on: April 08, 2012, 10:09:44 PM »

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Re: ICC Intercounty Connector
« Reply #267 on: April 30, 2012, 05:02:17 PM »

Montgomery Gazette (note: does not render correctly with my (current) version of  Firefox, 11.0): Drivers still not utilizing the ICC - State official: Toll road’s projected use proving accurate
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rickmastfan67

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Re: ICC Intercounty Connector
« Reply #268 on: April 30, 2012, 08:51:39 PM »

Montgomery Gazette (note: does not render correctly with my (current) version of  Firefox, 11.0): Drivers still not utilizing the ICC - State official: Toll road’s projected use proving accurate

Might want to update to FF 12 then (which was recently released). It's rendering fine in FF 13 Beta.

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Re: ICC Intercounty Connector
« Reply #269 on: May 03, 2012, 10:20:19 PM »

WTOP Radio: Hundreds of tickets distributed along the ICC

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Better be on your best behavior when driving the Intercounty Connector in Maryland. Over 300 traffic tickets are being handed out every month along the toll road that connects Gaithersburg to Laurel, according to statistics from Maryland Transportation Authority police.

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Those numbers could actually get worse. Figures show that MdTA police are also issuing about 500 warnings every month on the road.
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Re: ICC Intercounty Connector
« Reply #270 on: May 28, 2012, 06:01:05 PM »

Intercounty Connector a life-changer for motorists, residents

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Since opening last year, the Intercounty Connector has provided thousands of Maryland motorists with their first direct, congestion-free drive between Montgomery and Prince George’s counties.

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Gleeful drivers say the highway has cut up to a half-hour off their east-west trips between the busy commercial corridors of Interstates 95 and 270. But six months after the latest stretch of the ICC opened, concerns persist about the cost of such convenience — in traffic noise, pricey tolls and projects passed over in the face of the ICC’s $2.56 billion construction costs.
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Re: ICC Intercounty Connector
« Reply #271 on: June 01, 2012, 03:07:07 PM »

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Alps

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Re: ICC Intercounty Connector
« Reply #273 on: June 01, 2012, 10:56:47 PM »

TOLLROADSnews follow-up: Washington Post reports how users just Loooove the ICC TR in Montgomery Co MD
Why not just share the Washington Post news article instead of an opinion piece?

Because the comPost publishes opinion as often as it publishes news.
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Re: ICC Intercounty Connector
« Reply #274 on: June 04, 2012, 11:01:40 PM »

TOLLROADSnews follow-up: Washington Post reports how users just Loooove the ICC TR in Montgomery Co MD
Why not just share the Washington Post news article instead of an opinion piece?

http://www.washingtonpost.com/local/trafficandcommuting/intercounty-connector-a-life-changer-for-motorists-residents/2012/05/28/gJQAcDx6wU_story.html

Because Peter Samuel published some information that might be of interest to readers here which was not in the Post article. 
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