AARoads Forum

National Boards => General Highway Talk => Topic started by: Pete from Boston on February 07, 2015, 02:33:37 PM

Title: Guardrail vs Guiderail
Post by: Pete from Boston on February 07, 2015, 02:33:37 PM
It's come up that what we all like to refer to as "guardrail" along a highway is instead correctly termed a "guiderail." 

I am familiar with "guardrail" in building codes as the technical term for any fall protection barrier (generally 42" minimum off finished floor on any standing area over 30" in height).

Does "guardrail" have another meaning in roadway engineering, or is it still the same item I've described?
Title: Re: Guardrail vs Guiderail
Post by: Big John on February 07, 2015, 02:39:57 PM
Most states use "guardrail" as it is a safety feature to prevent vehicles from hitting what is behind it (including a steep downhill grade), but not as stiff as a thrie beam or a concrete barrier.  Wisconsin calls it a "Beam guard" for some reason.
Title: Re: Guardrail vs Guiderail
Post by: PurdueBill on February 07, 2015, 02:53:28 PM
Is "guardrail" actually incorrect?  FHWA says guardrail and guiderail are the same thing (http://safety.fhwa.dot.gov/roadway_dept/policy_guide/road_hardware/qa_bttabr.cfm#brrs9) and the link seems to suggest that the term "guiderail" comes from legal interpretation problems in a few states with the word "guard"--a dubious argument it seems, but something that managed to make it.  (I mean, what else would have to be renamed? Safety goggles because they don't keep you safe necessarily?) 
Title: Re: Guardrail vs Guiderail
Post by: PHLBOS on February 07, 2015, 02:56:10 PM
PennDOT uses guiderail in its construction specs. & details.
Title: Re: Guardrail vs Guiderail
Post by: vdeane on February 07, 2015, 03:06:35 PM
NY exclusively uses guiderail as well.  Some of the NYSDOT engineers are very passionate about this.
Title: Re: Guardrail vs Guiderail
Post by: briantroutman on February 07, 2015, 03:19:56 PM
I had a law class in high school (in Pennsylvania) where the teacher was very quick to correct anyone who said "guardrail" , saying that, for legal reasons, it doesn't definitively guard against a vehicle running off the road but instead attempts to guide it back on course.
Title: Re: Guardrail vs Guiderail
Post by: jeffandnicole on February 07, 2015, 03:24:58 PM
It's a terminology issue.  Guiderail and guardrail are the same thing. 
Title: Re: Guardrail vs Guiderail
Post by: Pete from Boston on February 07, 2015, 04:06:48 PM
How do these agencies refer to the fence-like structure that runs along a pedestrian walkway, which is the specific item the International Building Code uses the term "guardrail" for?
Title: Re: Guardrail vs Guiderail
Post by: kphoger on February 07, 2015, 04:16:46 PM
Quote from: Pete from Boston on February 07, 2015, 04:06:48 PM
How do these agencies refer to the fence-like structure that runs along a pedestrian walkway, which is the specific item the International Building Code uses the term "guardrail" for?

"Fence" ??
Title: Re: Guardrail vs Guiderail
Post by: Big John on February 07, 2015, 04:40:30 PM
Quote from: kphoger on February 07, 2015, 04:16:46 PM
Quote from: Pete from Boston on February 07, 2015, 04:06:48 PM
How do these agencies refer to the fence-like structure that runs along a pedestrian walkway, which is the specific item the International Building Code uses the term "guardrail" for?

"Fence" ??
yep
Title: Re: Guardrail vs Guiderail
Post by: Pete from Boston on February 07, 2015, 05:25:58 PM
So you're telling me the technical term for the ~42" rail on a bridge between a sidewalk and the water is "fence"? 
Title: Re: Guardrail vs Guiderail
Post by: Big John on February 07, 2015, 05:45:05 PM
Quote from: Pete from Boston on February 07, 2015, 05:25:58 PM
So you're telling me the technical term for the ~42" rail on a bridge between a sidewalk and the water is "fence"? 
I thought you meant a fence-like item on the ground.  On a bridge it is a rail on the sides whether metal and/or concrete or even timber.  I have seen a few cases where a fence was used as a bridge railing and it was referred to as a rail.  But I have not seen those referred to a guardrail nor a guiderail.
Title: Re: Guardrail vs Guiderail
Post by: hbelkins on February 07, 2015, 08:12:02 PM
It's officially guardrail in Kentucky. All the legalese about calling it "guiderail" is proof that Shakespeare was right about lawyers.
Title: Re: Guardrail vs Guiderail
Post by: cbeach40 on February 09, 2015, 12:53:52 PM
MTO uses "barrier" in general, "guiderail" applies more specifically to certain devices. "Guardrail" is seemingly viewed as the layman's term.
Title: Re: Guardrail vs Guiderail
Post by: slorydn1 on February 09, 2015, 05:01:34 PM
Its a guardrail here.

Damn lawyers, they have even found a way to screw us up too?????  :o
Title: Re: Guardrail vs Guiderail
Post by: lepidopteran on February 10, 2015, 06:15:42 PM
For the railing on the side of a bridge, what about "parapet"?

For what it's worth, elevators have guide rails (rollers on either side of the car), as do escalators (rollers on the sides of the steps).  The elevator industry appears to use two words instead of one.
Title: Re: Guardrail vs Guiderail
Post by: CANALLER on February 24, 2015, 09:06:49 PM
Guide Rail is a term that was created because of the accident lawyers suing the state, claiming that "Guard Rails" didn't guard vehicles from crashing through them.  This claim was made again a few years ago by a lawyer working for the father of a kid who got tanked well over the limit, then crashed through numerous signs and rails and drowned in the Union Canal.

The rails were never designed to prevent all vehicles from crashing through them, but rather to re-direct errant vehicles back on to the travelled way.  Despite the sad feelings of a family losing a loved one, they were never intended to guard drunk drivers from meeting tragic ends to their lives. 

Yet lawyers still try to make that claimt, so the word "Guard" was replaced with "Guide" in all of the legal documents.  A few of the design geek-types that Val referred to will always use that term to sound official, but everyone else uses the word guard in ordinary speech.
Title: Re: Guardrail vs Guiderail
Post by: adventurernumber1 on February 25, 2015, 08:42:55 AM
I have always heard "guardrail."

I don't think I've ever heard it spelled/pronounced as "guiderail" before.
Title: Re: Guardrail vs Guiderail
Post by: kphoger on February 25, 2015, 09:05:59 AM
Let's all coin a new term for them, then.

Ideas:
crashrail
slambar
nudgerail
scrapealong
splunge
Title: Re: Guardrail vs Guiderail
Post by: machias on February 26, 2015, 01:08:40 PM
Quote from: vdeane on February 07, 2015, 03:06:35 PM
NY exclusively uses guiderail as well.  Some of the NYSDOT engineers are very passionate about this.

I was quickly corrected by a professor in civil engineering school. A guiderail is definitely a guiderail at NYSDOT.
Title: Re: Guardrail vs Guiderail
Post by: yakra on December 19, 2016, 01:14:59 AM
Did he say, "SPLUNGE!"?
Title: Re: Guardrail vs Guiderail
Post by: J N Winkler on December 19, 2016, 11:31:26 AM
This is what is called a dialect marker (q.v. shibboleth (https://en.wikipedia.org/wiki/Shibboleth)).  Guiderail instantly marks you out as a NYSDOT purist (yes, even if the term is officially endorsed by some of NYSDOT's peer agencies).  Safety fence identifies you as a highway engineer who is either British or trained in Britain.  Guardrail is the term with the broadest usage base and thus the weakest overtones of regionalism, agency heirloomdom, and language policing.

Maintenance and protection of traffic (especially when abbreviated to MPT) is another term favored by NYSDOT purists.  The rest of the country calls it workzone traffic control or simply traffic control.
Title: Re: Guardrail vs Guiderail
Post by: paulthemapguy on December 20, 2016, 12:42:53 PM
Quote from: kphoger on February 25, 2015, 09:05:59 AM
Let's all coin a new term for them, then.

Ideas:
crashrail
slambar
nudgerail
scrapealong
splunge

:-D :-D :-D :-D What is a guardrail to you? It all depends on how you use it.
Title: Re: Guardrail vs Guiderail
Post by: Rothman on December 20, 2016, 12:47:47 PM
Quote from: kphoger on February 25, 2015, 09:05:59 AM
Let's all coin a new term for them, then.

Ideas:
crashrail
slambar
nudgerail
scrapealong
splunge

Whammy.
Title: Re: Guardrail vs Guiderail
Post by: cpzilliacus on December 20, 2016, 06:25:16 PM
Quote from: J N Winkler on December 19, 2016, 11:31:26 AM
Maintenance and protection of traffic (especially when abbreviated to MPT) is another term favored by NYSDOT purists.  The rest of the country calls it workzone traffic control or simply traffic control.

Maryland prefers MOT (maintenance of traffic).
Title: Re: Guardrail vs Guiderail
Post by: noelbotevera on December 20, 2016, 06:26:46 PM
Quote from: Rothman on December 20, 2016, 12:47:47 PM
Quote from: kphoger on February 25, 2015, 09:05:59 AM
Let's all coin a new term for them, then.

Ideas:
crashrail
slambar
nudgerail
scrapealong
splunge

Whammy.
metal thing
Title: Re: Guardrail vs Guiderail
Post by: Revive 755 on December 20, 2016, 10:29:12 PM
Quote from: noelbotevera on December 20, 2016, 06:26:46 PM
Quote from: Rothman on December 20, 2016, 12:47:47 PM
Quote from: kphoger on February 25, 2015, 09:05:59 AM
Let's all coin a new term for them, then.

Ideas:
crashrail
slambar
nudgerail
scrapealong
splunge

Whammy.
metal thing

Sidespark generator
Metallic doorscraper
Metallic redirector
Longitudinal target
Title: Re: Guardrail vs Guiderail
Post by: kphoger on December 23, 2016, 05:43:44 PM
Six and seven syllables?  Those will never catch on!