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Author Topic: Frontage Roads  (Read 18692 times)

DrZoidberg

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Frontage Roads
« on: January 30, 2009, 04:42:55 PM »

I have travelled through Texas, and noted the large used of frontage roads.  I'm wondering what the intended purpose of them is, other than providing more through lanes of traffic.  Is there a reason even older freeways were built with them?  It seems that they're simply used as extra mainlanes, but maybe I'm wrong.
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flaroads

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Re: Frontage Roads
« Reply #1 on: January 30, 2009, 04:54:49 PM »

Frontage roads provide direct access to homes and businesses that freeways do not.  In most cases, frontage roads are created when a mainline road is upgraded to limited-access status. A good example in the state of Florida is U.S. 19 in the Clearwater/Dundedin area. The mainline arterial is being upgraded to expressway status, complete with SPUI interchanges along secondary arterials.  Since this area was already inundated with commercial businesses, building the expressway in the same location would instantly cut them off the mainline.  Solution: build frontage roads on each side (in this case one-way frontage road pairs) to provide direct access to those businesses, and also providing access to the secondary arterials at the SPUI interchanges with slip ramps stratigically placed along the mainline of U.S. 19.

That is just one example of the usage of frontage roads.  I'm sure more of you can elaborate on this subject.
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Re: Frontage Roads
« Reply #2 on: January 30, 2009, 09:54:27 PM »

Another example is I-90 in Central Washington. North and South Frontage Roads are their names
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akotchi

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Re: Frontage Roads
« Reply #3 on: January 30, 2009, 10:05:18 PM »

When I-595 was built in the late 1980's into the 1990's, it was built with frontage roads that provided the local access that the previous arterial, FL-84, originally provided.  The frontage roads are still considered FL-84.

In some areas, frontage roads are used at specific interchanges to separate the weaving traffic movements from the through traffic at cloverleaf interchanges.
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rawr apples

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Re: Frontage Roads
« Reply #4 on: January 31, 2009, 12:57:29 PM »

Detroit has these all over. Though they are called 'service drives'
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Bryant5493

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Re: Frontage Roads
« Reply #5 on: February 01, 2009, 08:35:11 PM »

I agree with the above comments, but I'll chime in. Examples of frontage roads systems that I've seen are on I-20/59 in Meridian, Mississippi and I-85 in DeKalb County, between SR 42 (North Druid Hills Road) and I-285 (Spaghetti Junction). A lot of businesses, homes, apartments, etc. are located on both sides of the freeway.


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V'Ger

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Re: Frontage Roads
« Reply #6 on: February 02, 2009, 03:09:42 AM »

I always thought they were to maintain the grid.
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mightyace

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Re: Frontage Roads
« Reply #7 on: February 02, 2009, 07:44:42 PM »

I always thought they were to maintain the grid.

I guess that depends on where.

I-94 and US 41 in southern Wisconsin have frontage roads running nearly all the length from the IL border to where I-94 and US 41 split south of Milwaukee.  That territory is a mix of suburban and rural.
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Gridlock

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Re: Frontage Roads
« Reply #8 on: February 04, 2009, 12:08:31 PM »

i believe in TX the origin of frontage roads owes to rural areas where in order to get cooperation for highway ROW, they built frontage roads so local farmers/ranchers would still have access to others in their immediate area and offset having their property divided by the highway

in TX most people refer to them as feeder roads, especially in the cities.

the effect in urban areas like Dallas and Houston has been to further concentrate office/retail buildings along the highway rather than cross-streets thus intensifying the traffic on the highway (but sparing the more residential areas away from the highways).  an 8 or 10 lane freeway with 6 lanes of feeder roads and TX U-turns at intersections can move an lot of traffic.
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Marc

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Re: Frontage Roads
« Reply #9 on: February 06, 2009, 01:38:49 AM »

I am definitely not a fan of frontage roads. They attract commercial businesses along side of the freeway, which not only clutters the right-of-way with ugly business signage and buildings, but it also worsens traffic congestion alongside the freeway. We had frontage roads on sections of I-55 in Jackson, Mississippi when I lived there. The sections that do not have frontage roads to this day look much nicer and cleaner than the sections with frontage roads. Just my take.

There are several freeways in Texas I can think of without frontage roads. None are in Houston. Parts of I-35E in Dallas and Loop 1 in Austin have no frontage.
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DrZoidberg

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Re: Frontage Roads
« Reply #10 on: February 06, 2009, 10:33:00 AM »

Has Texas scrapped the use of frontage roads?  All the photos I've seen of new Houston freeway construction looks as though they're no longer using them (Fort Bend Parkway is one that comes to mind).  Also, I've never driven, but photos I've seen looks as though TX 288 doesn't have them either....
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Alex

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Re: Frontage Roads
« Reply #11 on: February 06, 2009, 12:33:53 PM »

Has Texas scrapped the use of frontage roads?  All the photos I've seen of new Houston freeway construction looks as though they're no longer using them (Fort Bend Parkway is one that comes to mind).  Also, I've never driven, but photos I've seen looks as though TX 288 doesn't have them either....

Doubful, Texas 121 Toll will be built within the median of the pre-built frontage roads when they finish it northeastward to U.S. 75. They are still building frontage roads for other future freeways and tollways, which is how they went about extending the Dallas North Tollway. Open the frontage roads first, add the freeways later.

With that stated, in Austin they are going to convert some of the existing arterials into llimited-access tollways with free at-grade frontage roads. Sal Costello, an opponent of the process of converting free roads into tolled highways has a blog where you can read more about what they are doing in the capital city.

Bryant5493

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Re: Frontage Roads
« Reply #12 on: February 10, 2009, 09:17:31 AM »

Here's an example of a frontage road and Tx U-turns, from Atlanta, Georgia.

The frontage roads and the Texas U-turns are from 0:00 to 3:07 in the video.

http://www.youtube.com/watch?v=Nr19NSV49lI


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un1

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Re: Frontage Roads
« Reply #13 on: February 10, 2009, 10:05:36 AM »

Frontage roads (also used in some parts of Ontario) are for homes, businesses, industries and roads that are next to the Freeway. Homes can't connect to the Freeway and some roads are to small to be on the freeway, so the just build them.
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Darkchylde

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Re: Frontage Roads
« Reply #14 on: February 12, 2009, 06:43:24 AM »

There are several freeways in Texas I can think of without frontage roads. None are in Houston. Parts of I-35E in Dallas and Loop 1 in Austin have no frontage.
Some parts of I-20 between Dallas and the Louisiana state line are also sans feeders.

Greybear

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Re: Frontage Roads
« Reply #15 on: February 12, 2009, 12:31:46 PM »

The same goes for I-30 between Dallas and Texarkana. The longest stretch of I-30 without frontage roads is between Mt. Pleasant and New Boston.
« Last Edit: February 12, 2009, 12:33:28 PM by Greybear »
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cjk374

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Re: Frontage Roads
« Reply #16 on: April 16, 2009, 09:03:26 PM »

Growing up, these were called "service roads".  They're still called that in Ruston, even though they have recently installed larger signs that say "Frontage Road".  And they just recently converted the service roads between exits 85 and 86 into one way roads.
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njroadhorse

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Re: Frontage Roads
« Reply #17 on: April 22, 2009, 08:12:27 PM »

I'm almost certain there's even a stretch of US 17 Business in Myrtle Beach that has frontage roads, which is very odd considering it's a 4-lane divided highway with scores of traffic lights.
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74/171FAN

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Re: Frontage Roads
« Reply #18 on: April 22, 2009, 09:33:40 PM »

Quote
I'm almost certain there's even a stretch of US 17 Business in Myrtle Beach that has frontage roads, which is very odd considering it's a 4-lane divided highway with scores of traffic lights.
  I know that north of US 501 US 17 Business is mainly 7 lanes undivided; however, I'm not sure about south of US 501.  US 58 in Virginia Beach on the Laskin Rd portion has frontage roads though.
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njroadhorse

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Re: Frontage Roads
« Reply #19 on: April 24, 2009, 03:54:03 PM »

Quote
Quote
I'm almost certain there's even a stretch of US 17 Business in Myrtle Beach that has frontage roads, which is very odd considering it's a 4-lane divided highway with scores of traffic lights.
  I know that north of US 501 US 17 Business is mainly 7 lanes undivided; however, I'm not sure about south of US 501.  US 58 in Virginia Beach on the Laskin Rd portion has frontage roads though.

My bad, that section of US 17 Business is actually in Surfside Beach
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Revive 755

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Re: Frontage Roads
« Reply #20 on: April 25, 2009, 11:56:57 AM »

Quote
I am definitely not a fan of frontage roads. They attract commercial businesses along side of the freeway, which not only clutters the right-of-way with ugly business signage and buildings, but it also worsens traffic congestion alongside the freeway. We had frontage roads on sections of I-55 in Jackson, Mississippi when I lived there. The sections that do not have frontage roads to this day look much nicer and cleaner than the sections with frontage roads. Just my take.

It probably depends somewhat on the area and zoning, as there are some highways around St. Louis with outer roads that are still mostly residential.  An example along US 40, but in a high-wealth area:
http://maps.google.com/maps?hl=en&ie=UTF8&ll=38.637439,-90.464215&spn=0,359.978027&z=16&layer=c&cbll=38.638313,-90.466681&panoid=2ia9l92SykbfPThmPhW92A&cbp=12,107.40942749877289,,0,3.4179687500000004

Another residential area with outer roads, this one along I-270 but near the northern edge of the wealthy area:
http://maps.google.com/maps?hl=en&ie=UTF8&ll=38.664067,-90.444818&spn=0,359.956055&z=15&layer=c&cbll=38.664432,-90.449331&panoid=mgS9SgJZJRYANtyi0XrJgw&cbp=12,178.34719727220192,,0,6.845703124999997

A middle wealth residential area along I-255 in Missouri.  There are some businesses near the interchanges, but the middle section is still nice:
http://maps.google.com/maps?hl=en&ie=UTF8&ll=38.497433,-90.311694&spn=0,359.978027&z=16&layer=c&cbll=38.499172,-90.310537&panoid=r14aABSRR_r7vn18lh9QBQ&cbp=12,310.7721174721828,,0,1.9238281250000004

I generally prefer outer roads in urban areas since they provide an easy alternative in case the main lanes get knocked out of commission, but not in the rural areas, since along I-44 they make it seem like an extremely long urban area.

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Re: Frontage Roads
« Reply #21 on: April 25, 2009, 12:56:53 PM »

US 27 in Tallahassee utilizes frontage roads for about a mile or so (Franklin Blvd to Governor's Square Mall) to better facilitate traffic movement. Instead of having to back up traffic for turn offs into Ross, Best Buy, Chilis, etc. it's easier to have slip ramps.
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Re: Frontage Roads
« Reply #22 on: May 04, 2009, 12:14:27 PM »

Over here they're called LAR - local access road. They are only used when an existing road is upgraded to a freeway to provide access for phohibited traffic and to allow access to side roads, houses and businesses which aren't allowed direct access to the freeway.
« Last Edit: May 05, 2009, 05:05:25 AM by Truvelo »
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Re: Frontage Roads
« Reply #23 on: May 04, 2009, 12:41:06 PM »

The entire length of I-49/US 167 between Lafayette and Opelousas has continuous two-way frontage roads; they mostly serve to serve residents and businesses fronting the freeway. 

Originally, US 167 was built to accommodate a future freeway upgrade by purchasing enough ROW for frontage roads and mainline roadways, as well as having wide medians at key intersections for future overpasses of crossroads. Direct connection of driveways to the mainline was accepted, but some frontage roads were built near the main intersections and in more developed areas to seperate local and through traffic.  When US 167 was upgraded to I-49, they simply built the overpasses, built out the frontage roads to access the local driveways, and eliminated all the at-grade median crossings and intersections.

US 90 south of Lafayette to Morgan City was designed in the same way, and the same two-way frontage road concept is being implemented as part of the I-49 South upgrade.  Within Lafayette Parish, however, more of a Texas-style one way "access road" approach is being proposed, with U-turns and the like. The exception will be in Lafayette proper, where the existing Evangeline Thruway, a six-lane arterial, will take over the access road service duties while I-49 is elevated above.


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Re: Frontage Roads
« Reply #24 on: May 27, 2009, 03:54:55 PM »

Detroit has these all over. Though they are called 'service drives'

Missouri calls them "Outer Roads"
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