171.11 Roadside Appurtenances: Difference between revisions

From Engineering_Policy_Guide
Jump to navigation Jump to search
← Older edit
Smithk (talk | contribs)
Modot, modot
20,986 edits
Deleted RAP (A2) Non-National Highway System Roadway Guardrail paragraph.
Smithk (talk | contribs)
Modot, modot
20,986 edits
Per EPS, revisions provide a distinction between the roles for contractors and maintenance when replacing and/or repairing guard cable. Guidance for maintenance of crashworthy end terminals, guardrail, guard cable and fixed impact attenuators has been removed from EPG 171.11.
 
Line 1: Line 1:
    
    
==RAP(A1) Crashworthy End Treatments==
On high speed (50 mph) and high volume (6000 vpd) [[:Category:123 Federal-Aid Highway Program#123.1.1 FHWA Oversight - National Highway System|National Highway System]] roads, [[606.1 Guardrail|guardrail]] approach ends that are damaged beyond repair shall be replaced with [[606.1 Guardrail#606.1.3.2 Approved Crashworthy End Terminals|crashworthy end sections]] meeting current standards.
Blunt ends, BCTs and turned downs may still be used on the trailing ends of guardrail, on one-way highways in locations where they cannot be impacted from the reverse direction, if they provide the anchorage needed for redirection of an impacting vehicle.
Guardrail end treatments shall be periodically adjusted for tension.
Reason for policy:
* To ensure guardrail is placed in appropriate locations and installed as per current specifications
Effective Date: 6/1/99
Revision Dates:
==RAP(A3) Signpost Breakaway Features==
==RAP(A3) Signpost Breakaway Features==
All sign posts are to be installed and maintained with breakaway features on all MoDOT maintained highways.
All sign posts are to be installed and maintained with breakaway features on all MoDOT maintained highways.
Line 29: Line 15:


==171.11.1 Protective Barrier==
==171.11.1 Protective Barrier==
===RAP(B1) [[606.1 Guardrail|Guardrail]]===
Guardrail is placed at hazardous locations as a protective barrier that both restrains and redirects traffic.  Requests for the placement of additional guardrail by the public should be considered on the basis of traffic safety and design criteria.  All installations of guardrail must meet standard design and construction specifications.
Guardrail should not be used indiscriminately to avoid posing a greater hazard than the hazard itself.  Guardrail should not be used to protect non-MoDOT property off the right of way.
Reason for policy:
* To ensure guardrail is placed in appropriate locations and installed as per current specifications
Effective Date: 6/1/99
Revision Dates:
===RAP(B2) [[606.2 Guard Cable|Guard Cable]]===
Cable and wire fabric guardrail shall be periodically adjusted for tension to assure effectiveness and to improve appearance.
Reason for policy:
* To ensure guard cable will perform as designed 
Effective Date: 6/1/99
Revision Dates: 
===RAP(B3) Fixed Impact Attenuators===
The maintenance and repair of fixed impact attenuators requires the replacement units to be spotted in the same locations as the original modules.  A detailed drawing of each installation should be available for maintenance crews performing needed repairs.
Reason for policy:
* To assure proper operation of fixed impact attenuators
Effective Date: 6/1/99
Revision Dates:   


===RAP(B4) [[:Category:617 Traffic Barrier|Concrete Median Barriers]]===
===RAP(B4) [[:Category:617 Traffic Barrier|Concrete Median Barriers]]===

Latest revision as of 07:37, 18 November 2021

RAP(A3) Signpost Breakaway Features

All sign posts are to be installed and maintained with breakaway features on all MoDOT maintained highways.

Reason for policy:

  • To meet FHWA standards
  • To reduce potential damages from errant vehicles striking roadside signs

Effective Date: 6/1/99

Revision Dates:

RAP(A4) Culvert Ends

See S&A(C2) Culvert Ends.

171.11.1 Protective Barrier

RAP(B4) Concrete Median Barriers

Concrete median barriers shall be replaced or repaired where the damage resulted in loss of a significant piece of concrete. The type of section and extent of damage will dictate whether the section should be replaced or repaired in place.

Reason for policy:

  • To assure proper operation of barriers

Effective Date: 6/1/99

Revision Dates:

Retrieved from "https://epgtest3.modot.org/index.php?title=171.11_Roadside_Appurtenances&oldid=50668"