Safety Design and Guardrails

Revised: July 26, 2023

CLEAR ZONE AND SAFETY PLANS

CABLE BARRIER

CRASH CUSHIONS

GUARDRAIL DETAILS

GUARDRAIL CONNECTIONS

GUARDRAIL (SPECIAL CASES)

GUARDRAIL TERMINALS

GUARDRAIL ANCHORS

CONCRETE MEDIAN BARRIERS

GUARDRAIL MAINTENANCE

CLEAR ZONE AND SAFETY PLANS
DRAWING RELATED IB REVISION DATE DESCRIPTION
  06/28/2019
CLEAR ZONE CRITERIA
IB 23-04 03/01/2023 SAFETY PLAN FOR BARRIER LENGTH OF NEED
S-PL-1A IB 23-04 03/01/2023 SAFETY PLAN FOR BARRIER LENGTH OF NEED (FOR RIGID OBJECTS)
S-PL-1B IB 23-04 03/01/2023 SAFETY PLAN FOR BARRIER LENGTH OF NEED ON CURVED ROADWAYS
IB 23-04 03/01/2023
SAFETY PLAN MINIMUM INSTALLATION AT BRIDGE ENDS
  06/28/2019
SAFETY PLAN FOR BRIDGE PIERS IN CLEAR ZONE
S-PL-4A IB 23-11   SAFETY PLAN FOR BRIDGE PIERS IN CLEAR ZONE & OUT OF CLEAR ZONE
  06/28/2019
SAFETY PLAN FOR BRIDGE ENDS IN MEDIANS
  06/15/2021
SAFETY PLAN SAFETY HARDWARE PLACEMENT ON OUTSIDE EDGE
  06/28/2019
SAFETY PLAN SAFETY HARDWARE PLACEMENT IN MEDIAN
       

CABLE BARRIER
DRAWING RELATED IB REVISION DATE DESCRIPTION
IB 23-11 07/07/2023
CABLE BARRIER PLACEMENT
S-CB-2 IB 23-11 07/07/2023 HIGH TENSION CABLE BARRIER
       

CRASH CUSHIONS
DRAWING RELATED IB REVISION DATE DESCRIPTION
IB 23-04
03/01/2023
CRASH CUSHION
  06/28/2019
CRASH CUSHION (GATING) BARREL ARRAY
       

 GUARDRAIL DETAILS
DRAWING RELATED IB REVISION DATE DESCRIPTION
 
06/15/2021
GUARDRAIL DETAILS
  06/28/2019
GUARDRAIL AND BLOCK-OUT DETAILS
S-GR31-1B
     GUARDRAIL FASTENING HARDWARE
S-GR31-1C IB 23-11 07/07/2023 GUARDRAIL GENERAL NOTES AND POST DETAILS
S-GR31-1D IB 23-04 03/01/2023 GUARDRAIL POST PLACEMENT IN ROCK
       

GUARDRAIL CONNECTIONS
DRAWING RELATED IB REVISION DATE DESCRIPTION
S-GRC-4 IB 23-11 07/07/2023 GUARDRAIL CONNECTION TO BRIDGE RAILING CONCRETE PARAPET
S-GRC-5
   02/28/2020 GUARDRAIL CONNECTION TO BRIDGE ENDS (TRAILING ENDS)
S-GRC-6 IB 23-11 07/07/2023 GUARDRAIL CONNECTION TO BRIDGE ENDS FOR LOW SPEED ROADWAYS
       

GUARDRAIL (SPECIAL CASES)
DRAWING RELATED IB REVISION DATE DESCRIPTION
S-CPW-1
     CURVED PARAPET WALL ≤ 40 M.P.H.
 
06/15/2021
SPECIAL CASE LONG SPAN GUARDRAIL 1 POST, 2 OR 3 POSTS OMITTED
 
01/28/2022
SPECIAL CASE GUARDRAIL ATTACHMENT TO CONCRETE DECKS
 
06/28/2019
SPECIAL CASE GUARDRAIL FOOTING
 
05/04/2022
SPECIAL CASE GUARDRAIL HEIGHT TRANSITION DETAIL
S-GRS-5     SPECIAL CASE WEAK-POST GUARDRAIL ATTACHMENT TO CULVERT
S-GRS-5A   06/15/2021 WEAK-POST GUARDRAIL ASSEMBLY DETAILS FOR TYPE 1 & 2
S-GRS-5B       WEAK-POST GUARDRAIL ASSEMBLY DETAILS FOR TYPE 3 & 4
S-GRS-6     SPECIAL CASE FLEXIBITLTY ON GUARDRAIL POST INSTALLATIONS
S-GRS-7 IB 23-04   SHORT – RADIUS GUARDRAIL SYSTEM (SRGS)
S-GRS-7A IB 23-04   SHORT – RADIUS GUARDRAIL SYSTEM (SRGS) DETAILS
       

GUARDRAIL TERMINALS
DRAWING RELATED IB REVISION DATE DESCRIPTION
 
10/29/2021
TYPE 12 GUARDRAIL TERMINAL BURIED-IN-BACKSLOPE
S-GRT-1A     LAYOUT OF FLARED GUARDRAIL (TL- 3)
S-GRT-1B     LAYOUT OF FLARED GUARDRAIL (TL- 2)
 
06/28/2019
TYPE 38 GUARDRAIL END TERMINAL
 
10/16/2020
EARTH PAD FOR TYPE 38 AND TYPE 21 TERMINAL
 
06/28/2019
EARTH PAD FOR TYPE 38 AND TYPE 21 TERMINALS (RETROFIT)
 
06/28/2019
TYPE 21 GUARDRAIL END TERMINAL
       

GUARDRAIL ANCHORS
DRAWING RELATED IB REVISION DATE DESCRIPTION
 
06/28/2019
TYPE 12 GUARDRAIL ANCHOR
  06/28/2019
GUARDRAIL ANCHOR FOR TYPE 12 TERMINAL (ALTERNATIVE)
  06/15/2021
TYPE 13 GUARDRAIL ANCHOR
IB 23-04 03/01/2023
IN-LINE GUARDRAIL ANCHOR
  06/28/2019
FLARED GUARDRAIL ANCHOR
       

CONCRETE MEDIAN BARRIERS
DRAWING RELATED IB REVISION DATE DESCRIPTION
 
01/28/2022
32” SINGLE SLOPE CONCRETE BARRIER WALL
S-SSMB-1A   10/29/2021 36" SINGLE SLOPE CONCRETE BARRIER WALL
  10/29/2021
51” SINGLE SLOPE CONCRETE BARRIER WALL
  10/29/2021
51” HALF SIZE SINGLE SLOPE CONCRETE BARRIER WALL
  07/17/2020
FLARED SINGLE SLOPE CONCRETE MEDIAN BARRIER WALL (VERTICAL BACK)
  05/01/2020
SINGLE SLOPE MEDIAN BARRIER WALL CATCH BASIN DETAIL
 
06/28/2019
32" CONCRETE SINGLE SLOPE BARRIER WALL WITH SINGLE GUARDRAIL ATTACHMENT
S-SSMB-6A
     36” CONCRETE SINGLE SLOPE BARRIER WALL FOR ATTACHING GUARDRAIL
S-SSMB-6B       DUAL GUARDRAIL ATTACHMENT TO SINGLE SLOPE 36” BARRIER WALL
S-SSMB-6C       SINGLE GUARDRAIL ATTACHMENT TO SINGLE SLOPE 36” BARRIER WALL
S-SSMB-6D       51” CONCRETE SINGLE SLOPE BARRIER WALL FOR ATTACHING GUARDRAIL
S-SSMB-6E       DUAL GUARDRAIL ATTACHMENT TO SINGLE SLOPE 51” BARRIER WALL
S-SSMB-6F       SINGLE GUARDRAIL ATTACHMENT TO SINGLE SLOPE 51” BARRIER WALL
  05/01/2020
FOOTING DETAILS FOR OVERHEAD SIGN STRUCTURE 32” MEDIAN BARRIER WALL
  05/01/2020
FOOTING DETAILS FOR OVERHEAD SIGN STRUCTURE 51” MEDIAN BARRIER WALL
  10/29/2021
SINGLE SLOPE BARRIER WALL FOR GRADE SEPARATED MEDIAN
S-SSMB-10 IB 23-04   SPECIAL DETAIL FOR CONCRETE MEDIAN BARRIER WALL BARRIER WALL TRANSITION FROM 32” TO 51”
       

GUARDRAIL MAINTENANCE
DRAWING RELATED IB REVISION DATE DESCRIPTION
  06/15/2021 W-BEAM & THRIE BEAM BARRIER RAIL AND RUB RAIL DETAILS
S-GR28-2M
   06/28/2019
GUARDRAIL HARDWARE DETAILS
S-GR28-3M
   01/28/2022
GUARDRAIL HEIGHT ADJUSTMENT
  06/28/2019
GUARDRAIL TERMINAL ANCHOR TYPE 13
S-GR28-5M
   06/28/2019
MEDIAN DIVIDER GUARDRAIL
S-GR28-6M   10/29/2021
GUARDRAIL ATTACHMENT TO CONCRETE DECKS
S-GR28-7M
   06/28/2019
GUARDRAIL ATTACHMENT TO BRIDGE END DETAILS
S-GRC-1M     GUARDRAIL CONNECTION TO BRIDGE ENDS OR BARRIER WALL
S-GRC-2M     GUARDRAIL CONNECTION TO BRIDGE END FOR LOCAL ROADS (ADT < 2000)
S-GRC-3M     MEDIAN DIVIDER GUARDRAIL TRANSITION TO CONCRETE MEDIAN BARRIER
S-PL-2M* IB 23-04   SAFETY PLAN AT SIDE RSAFETY PLAN AT SIDE ROADS OR PRIVATE DRIVES
S-SSMB-6M     GUARDRAIL ATTACHMENT TO EXISTING SINGLE SLOPE CONCRETE BARRIER WALL
       

* NOTE: Standard drawing S-PL-2 has been renamed to S-PL-2M and has been placed under the Guardrail Maintenance Series.

If you find any mistakes, missing information or have a question, contact:
TDOT CADD Support
1200 James K. Polk Building
Nashville, TN 37243-1402
TDOT.CADDSupport@tn.gov

This Page Last Updated: November 7, 2023 at 3:03 PM