alternate treatment - two lanes (flare rate = 2a:b)

4" Asphalt material placed on 4'-0" embankment widening unless flume inlet and slope drain is constructed.

1-10-07 Changed Bituminious to Asphalt5 S.W.K. J.O.B.

S.W.K. J.O.B.

Normal project side slope. See typical sections.

See Design Parameters table on this sheet for radius, length of curve and flare rate information.

11

Note: Flare rate of a:b and curve length of 25'-0" shall be used when

guardrail is beyond shyline, flare rate of 2 a:b and curve length of

12'-6" shall be used when guardrail is located inside the shy line.

E.W.S.

ÚLine of normal slope change

Line of normal slope changeÜ

b2a

ì Bridge

E.W.S.

E.W.S.

slope of bridge berm.

See bridge plans forThis area to be maintained

free of fixed objects.


This area to be maintained



5'5'

5'5' 100'-0"

Varies

50'-0"

variable

5'5'

100'-0"

50'-0"

5'5' 100'-0"

Varies

5'5'

100'-0"

31'-3"

31'-3"

30'-0"

Varies

50'-0"

31'-3"

50'-0"

Varies

30'-0"

31'-3"

30'-0"

25'-0"

25'-0"

25'-0"

25'-0"

guardrail

4'-0" from face ofguardrail

4'-0" from face of

31'-3"

10:1 or flatter

10:1 or flatter

10:1 or flatter

10:1 or flatter

a

ôb

ôb

a

E.W.S.

ô

Line of normal slope change

Line of normal slope changeÜ

ô

ab

ôb

a

100'-0"

3:1 or flat.

12.5'

10:1 or flatter

3:1 or

flatter

flatter

3:1 or

flatter

4:1 or

var.

Slo

pe

Slope varies

Slo

pe

Slope varies

Slo

pe

Slo

pe

Slo

pe

Slo

pe

6'-0" to face of rail




6'-0" to face of railVar.

of guardrail

4'-0" fr

om face

Varies

Slo

pe

R = ô

R = ô

R = ô

R = ô

R=ô

ô

SECTION A-A

PLAN VIEW TWO LANE

Var.12'-0" 6'-0"

25' 25'

Sho. width

ab b

a

Area of Concern

4.2% Slope

Clear zone

W-beam Guardrail

Normal project side slope

(not steeper than 4:1) to

clear zone.

A

A

A

A

"D"

Area of concern

"Y"

25̂

ENLARGEMENT - AREA OF CONCERN

Area of Concern

Guardrail shall be nested and post spacing reduced

to one half of normal spacing when "Y" is less than 5'.

Rigid barrier shall be used when "Y" is less than 3'-3".

"Y"

DETAILS OF GUARDRAIL PROTECTION AT ROADSIDE OBSTACLE

4:1 or

var.

var.

6

A.L.R. T.T.R.

Added Roadside obstacle details

25'

ab

W-beam Guardrail

A

Area of Concern

Terminal Type ||

A

PLAN VIEW FOUR LANE

ì MedianÜ

Shoulder lineÜ

ÙShoulder line

ÙShoulder line

Shoulder lineÜÚFace of Guardrail

Shoulder lineÜ

ì BridgeÜ

ì Exit lanesÜ

ì BridgeÜ

ì MedianÜ

Edge of traveled wayÛ

ÚEdge of traveled way





ì Entering lanesÜ

Shoulder lineÛ



ÚShoulder line





Shoulder lineÜ

Shoulder lineÛ

Shoulder lineÜ

Shoulder lineÛ

Shoulder lineÜ

Shoulder lineÛ

Shoulder lineÜ

ì BridgeÜ

Úì

ìÜ

ìÜ

ìÜ

RD612A

TRACED

TRACE CK.

APP'D.

of guardrail

4'-0" from face

of guardrail

4'-0" from face

flatter

4:1 or

flatter

3:1 or

flatter

3:1 or fl

atter

3:1 or

TerminalEnd

Terminal

End

TerminalEnd

Terminal

End

Terminal

End

section, including the thrie-beam transition, is 12'-6"

The minimum length of w-beam guardrail required between the guardrail end terminal and any transition

7

(FLEAT or SRT) End Terminal




End Terminal

(FLEAT or SRT)

(FLEAT or SRT) End Terminal End Terminal

(FLEAT or SRT)

SCOTT W. KING

for details and general note.

Thrie Beam Transition. See KDOT's 'Thrie Beam Guardrail Transition Details' Standard Drawings

8

7-2-09

5-15-17 Removed X-LITE A.L.R. S.W.K.

slope of bridge berm.

See bridge plans for

guardrail

4'-0" from face of

of guardrail

4'-0" from face

free of fixed objects


varies

Slo

pe

flatter

3:1 or

flatter

4:1 or

flatter

3:1 or

variable

4:1 or

var.

Slo

pe

THRIE BEAM TRANSITION - TWO LANES325.16'

375.14'

225.23'

375.55'

350.59'

275.76'

250.83'

262.70'

300.17'300.69'

200.26'201.04'

60

70

50

55

45

40 8:1

DESIGN PARAMETERS

(mph)SpeedDesign

(a:b)RateFlare

(R)Radius

(2a:b)RateFlare

(R)Radius

15:1

14:1

12:1

11:1

10:1

30:1

26:1

24:1

21:1

18:1

16:1

variable

4:1 or

ALTERNATE TREATMENT - TWO LANES (Flare Rate = 2a:b)

10:1 Slope

3:1 or flatter

flatter

4:1 or

var.

4:1 or

varies

Slo

pe

Use Type II Terminal

Guardrail on shoulder line as needed.

THRIE BEAM TRANSITION - FOUR LANES (DIVIDED)

Type II T

erm.

Sta. of

Begin

need.

for calculated length of

of Guardrail upstream

Install appropriate length

Type II T

erm.

Sta. of

Begin

reduced by length "D".

only, total length of need may be

jacent traffic in one direction

On divided facility with ad-

FHWA APPROVAL

DESIGNED

DETAILED

DESIGN CK. DETAIL CK. QUAN.CK.

RD

TRACED

TRACE CK.

QUANTITIES

APP'D.

rd612a.d

gn

File :

Dra

wn B

y :trhoads

Plotted :18-J

UL-2

018 1

5:3

0

STATE

KANSAS

YEARPROJECT N0.SHEETS

TOTALSHEET NO.

DATE REVISIONS BY APP'DNO.

KANSAS DEPARTMENT OF TRANSPORTATION

TYPICAL ALIGNMENTS (FLARED)

BRIDGE APPROACH TRANSITION

THRIE BEAM GUARDRAIL

See KDOT's 'Guardrail Auxiliary Details' Standard Drawing.

Removed Flare-beyond-the-Flare

quantities.

this s

heet

when the flare

d g

uardrail d

esig

n is selecte

d. Inclu

de m

aterial for asphalt g

uardrail wid

enin

g in the pla

n

L = 4

3.7

5' for flare rate of a:b a

nd L = 3

7.5' for flare rate of 2 a:b for a typical installation as s

ho

wn o

n this s

heet. Use

usin

gRoadsid

e D

esig

n G

uid

eN

ote to D

esig

ner: D

etermined g

uardrail length of need in accord

ance with the A

AS

HT

O

6-5-18

6-19-18

KD

OT G

raphics C

ertified

KDOT Graphics Certified 07-18-2018

alternate treatment - two lanes (flare rate = 2a:b)

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