Need to Re-Lap Guardrails in Work Zones
Guardrails
NMDOT specs require guardrail to be overlapped in the same direction as the direction of traffic in the nearest lane for permanent construction. In the past, there was a requirement to re-lap guardrail in work zones if the direction of travel had changed (i.e. NB and SB traffic both on NB lanes). That requirement has disappeared from our specs and drawings and I’ve received some questions from field staff on whether NMDOT should still require the re-lapping. Is there any testing on reverse impact of guardrails? I see some for end treatments but not necessarily on the guardrail itself.
Nauman Sheikh ( )
Regardless of the lapping practice, guardrail splices can be hit in both directions. Lapping guardrail splices with the exposed rail edge located in the downstream direction of the adjacent traffic is generally a good practice. It should be retained for new installations and, whenever possible, for repaired installations. Keeping the exposed edge of the guardrail in the downstream direction of the adjacent traffic minimizes the potential for vehicle wheel or door snagging.
It should be noted, however, that both rail segments are tightly connected at a splice location. Both rail elements have same lateral stiffness. For these reasons, the two connected segments move together with very little potential for large separation at the splice during vehicle impact. This reduces the chance of a severe vehicle snag. While it is generally a good practice where practical, lapping splices in the manner described above may not be a critical requirement for the guardrail to function properly.
List of Backlinks ( )
Hello there! Do you know if they make any plugins to help with SEO?
I’m trying to get my blog to rank for some targeted keywords but I’m not seeing very good results.
If you know of any please share. Cheers! You can read
similar article here: AA List
e-commerce ( )
Wow, superb blog layout! How long have you been blogging for?
you made running a blog look easy. The full look of your web site is great,
let alone the content material! You can see similar here dobry sklep
Christoper72 ( )
Wow, superb weblog format!
How long have you been blogging for? you make running a blog look easy.
The entire look of your web site is wonderful, as smartly
as the content! I read similar here prev next
and those was wrote by Charlie83.
Elinor69 ( )
Wow, marvelous weblog format!
How long have you been running a blog for? you made running a
blog glance easy. The entire look of your site is wonderful,
as smartly as the content! You can read similar here prev next and it’s was
wrote by Dinorah87.
SherrylRup ( )
Wow, incredible blog layout!
How lengthy have you ever been blogging for? you made
running a blog glance easy. The full look of your web site is
magnificent, as well as the content! I saw similar here prev next and
it’s was wrote by Loyd99.
Robert Ryw8 ( )
Wow, marvelous blog layout!
How lengthy have you ever been blogging for? you make running a
blog glance easy. The entire look of your web site is fantastic, let alone the content!
I read similar here Robert Ryw8.
2024/04/23