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Old July 22nd, 2010, 12:07 AM   #1
diablo234
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Frontage Roads, Service Roads, & Access Roads

In Texas and I think a few other states in the U.S, most urban freeways and tollways have something called frontage roads that have a dual purpose of serving as the exit and property along the freeway. Frontage roads (also called an access road, feeder, service drive, service road, outer roads) are non-limited access roads that run parallel to a higher-speed road, usually a freeway, and feeding it at appropriate points of access (interchanges). In urban areas in Texas, frontage roads are frequently one-way roads when they exist on both sides of a highway. In more rural areas, such roads are typically two-way.

Frontage roads provide access to homes and businesses which would be cut off by a limited access road and connect these locations with roads which have direct access to the main roadway. Frontage roads give indirect access to abutting property along a freeway, either preventing the commercial disruption of an urban area that the freeway traverses or allowing commercial development of abutting property.
http://en.wikipedia.org/wiki/Frontage_road


Example of a Frontage Road in Irving, TX


Another example of a Frontage Road in Houston on I-10. (photo taken from Texasfreeway.com)


Example of a frontage road on U.S 281 in San Antonio. (photo taken from Texasfreeway.com)



Example of a Turnaround/U-Turn lane where traffic can make a u-turn without stopping at a traffic signal. Relatively common on Texas frontage roads.

Know of any frontage roads on freeways/motorways elsewhere in the world?
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Old July 22nd, 2010, 12:24 AM   #2
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You sometimes see it in Europe where a motorway was constructed directly over the existing all purpose road, and slow traffic has been moved to the frontage roads. I've seen it in the Netherlands, Poland and Spain.
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Old July 22nd, 2010, 12:30 AM   #3
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This is the best idea for urban freeways though it does take up more land.
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Old July 22nd, 2010, 12:38 AM   #4
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Quote:
Originally Posted by ChrisZwolle View Post
You sometimes see it in Europe where a motorway was constructed directly over the existing all purpose road, and slow traffic has been moved to the frontage roads. I've seen it in the Netherlands, Poland and Spain.
Italian tangenziali are sort of service roads
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Old July 22nd, 2010, 12:39 AM   #5
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By elsewhere in the world, you mean outside the US? I know they're pretty common - maybe even standard - in Quebec.
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Old July 22nd, 2010, 01:23 AM   #6
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Most stretch sof freeway in metro Detroit are lined with them(we called them service drives), but they're nothing like the big box lined ones in Texas.

http://maps.google.com/maps?hl=en&ie...,86.05,,0,3.88


http://maps.google.com/maps?hl=en&ie...71.72,,0,-2.73


http://maps.google.com/maps?hl=en&ie...180.78,,0,0.04

http://maps.google.com/maps?hl=en&ie...177.94,,0,1.43
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Old July 22nd, 2010, 01:26 AM   #7
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The northern Ljubljana bypass (Slovenia) has them:
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Originally Posted by Turtle09 View Post
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Old July 22nd, 2010, 01:37 AM   #8
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They are also very common in Italy. for example, if there is a highway bypassing a city with a nord and a south exit, there is a parallel road connecting exits.
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Old July 22nd, 2010, 01:39 AM   #9
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I am not sure whether this kind of road counts or not.

It goes alongside A3, and is called Tolworth rise N or S and farther Malden way.



















I know, pictures are far from being perfect
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Old July 22nd, 2010, 01:53 AM   #10
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Polish A4 in Upper Silesia:



Heading West:




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Old July 22nd, 2010, 03:21 AM   #11
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Quote:
Originally Posted by hofburg View Post
They are also very common in Italy. for example, if there is a highway bypassing a city with a nord and a south exit, there is a parallel road connecting exits.
That's C/D road.
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Old July 22nd, 2010, 05:16 AM   #12
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Brazil






image hosted on flickr





image hosted on flickr


image hosted on flickr


image hosted on flickr

Last edited by engenx4; July 22nd, 2010 at 05:41 AM.
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Old July 23rd, 2010, 08:58 PM   #13
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Quote:
Originally Posted by piotr71 View Post
I am not sure whether this kind of road counts or not.

It goes alongside A3, and is called Tolworth rise N or S and farther Malden way.



















I know, pictures are far from being perfect
That would technicaly be a frontage road.
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Old July 23rd, 2010, 09:52 PM   #14
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Sort of the same idea from the N4 dual carriageway in West Dublin, Ireland:





Another photograph from flickr.

The far left lane on the road has been designated for local access only, and is blocked off from the rest of the road.

By contrast, the other side of the dual carriageway has a 24-hour bus lane instead of a hard shoulder.

Here it is on a map.

Last edited by Catmalojin; July 23rd, 2010 at 10:43 PM.
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Old July 24th, 2010, 03:27 AM   #15
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In Mexico almost all urban freeways are accompanied by frontage roads. Here's an example in Monterrey.

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Old July 24th, 2010, 05:46 AM   #16
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A lot of the towns on I-95 in North Carolina have these.
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Old July 24th, 2010, 05:47 AM   #17
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Quote:
Originally Posted by piotr71 View Post
I am not sure whether this kind of road counts or not.

It goes alongside A3, and is called Tolworth rise N or S and farther Malden way.



















I know, pictures are far from being perfect
While technically frontage roads, I think frontage roads in the sense that we are talking are different. Were those residential streets there before the expressway? Then they aren't really frontage roads, just roads that squeeze in the expressway. If they were built after the expressway as roads to filter access onto and off of the expressway, then they are true frontage roads.
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Old July 24th, 2010, 12:56 PM   #18
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Comparison of mentioned Kingston Bypass in 1963 and 2002:
Quote:
CBRD
So, as we can see, so called frontage roads were built after opening the by-pass.

CBRD says:

http://www.cbrd.co.uk/histories/ring...stern/a3.shtml
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Old July 24th, 2010, 02:37 PM   #19
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Well, Italian tangenziali are not frontage roads. I understand that frontage roads provide direct access to buildings and estates on the side of the road, and thus have at-grade intersections. Tangenziali have not, they're made like expressways and are accessible only thru ramps.
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Old July 26th, 2010, 03:40 PM   #20
LMB
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Quote:
Originally Posted by ChrisZwolle View Post
You sometimes see it in Europe where a motorway was constructed directly over the existing all purpose road, and slow traffic has been moved to the frontage roads. I've seen it in the Netherlands, Poland and Spain.
But in Poland they are often blocked to local traffic, i.e. cul-de-sac.
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