Tollway Barrier Guidelines Examples Hands-On Workshop III July

Each AOC should be analyzed separately. a. Establish EOTWj. Warrant Analysis Level b. Design Speedk. Lateral Offset of Barrier c. Design ADTl. Upstream End of Guardrail d. Length of Runoutm. Upstream End of Barrier Wall e. Shy Line Offsetn. Downstream Terminal f. Foreslope / Backslopeo. Barrier Obstacle g. Clear Zonep. Compare existing length to proposed h. Clear Zone Adjustmentq. Prepare warrant text and exhibits i. Lateral Extent of the Area of Concern 2

Level 2 Example- Location 9 3

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Each AOC shall be analyzed separately. a. Establish EOTW 5

Each AOC shall be analyzed separately. a. Establish EOTW b. Design Speed 6

Each AOC shall be analyzed separately. a. Establish EOTW b. Design Speed c. Design ADT 7

Each AOC shall be analyzed separately. a. Establish EOTW b. Design Speed c. Design ADT d. Length of Runout 8

L2L2 Figure Approach Barrier Layout Variables LRLR 9

Level 2 Example- Location 9 10

Each AOC shall be analyzed separately. a. Establish EOTW b. Design Speed c. Design ADT d. Length of Runout e. Shy Line Offset 11

Each AOC shall be analyzed separately. a. Establish EOTW b. Design Speed c. Design ADT d. Length of Runout e. Shy Line Offset f. Foreslope / Backslope 12

Each AOC shall be analyzed separately. a. Establish EOTW b. Design Speed c. Design ADT d. Length of Runout e. Shy Line Offset f. Foreslope / Backslope g. Clear Zone 13

g. Clear Zone Select highest value in range Table 3-1 Clear Zone Distances in Feet from EOTW 14

Each AOC shall be analyzed separately. a. Establish EOTW b. Design Speed c. Design ADT d. Length of Runout e. Shy Line Offset f. Foreslope / Backslope g. Clear Zone h. Clear Zone Adjustment 15

h. Clear Zone Adjustment 16

Each AOC shall be analyzed separately. a. Establish EOTW b. Design Speed c. Design ADT d. Length of Runout e. Shy Line Offset f. Foreslope / Backslope g. Clear Zone h. Clear Zone Adjustment i. Lateral Extent of the Area of Concern 17

i. Lateral Extent of the Area of Concern L2L2 Figure Approach Barrier Layout Variables LALA 18

Level 2 Example- Location 9 Lateral Extent of the Area of Concern L A = L A = 23.9’ + 1.5’ = 25.4’ 19

Each AOC shall be analyzed separately. a. Establish EOTWj. Warrant Analysis Level b. Design Speed c. Design ADT d. Length of Runout e. Shy Line Offset f. Foreslope / Backslope g. Clear Zone h. Clear Zone Adjustment i. Lateral Extent of the Area of Concern 20

Flowchart for Analysis of Existing Obstacles (Figure 5.5a) 21

Each AOC shall be analyzed separately. a. Establish EOTWj. Warrant Analysis Level b. Design Speedk. Lateral Offset of Barrier c. Design ADT d. Length of Runout e. Shy Line Offset f. Foreslope / Backslope g. Clear Zone h. Clear Zone Adjustment i. Lateral Extent of the Area of Concern 22

k. Lateral Offset of Barrier L2L2 Figure Approach Barrier Layout Variables L2L2 23

Level 2 Example- Location 9 L A = 23.9’ + 1.5’ = 25.4’ Lateral Offset of Barrier L 2 = L 2 = 1’ + 11’ + 1’ = 13.0’ 24

Each AOC shall be analyzed separately. a. Establish EOTWj. Warrant Analysis Level b. Design Speedk. Lateral Offset of Barrier c. Design ADTl. Upstream End of Guardrail d. Length of Runout e. Shy Line Offset f. Foreslope / Backslope g. Clear Zone h. Clear Zone Adjustment i. Lateral Extent of the Area of Concern 25

Level 2 Example- Location 9 L A = 25.4’ L 2 = 13.0’ Y= Y = L ’ Y = 13.0’ ’ Y = 13.75’ 26

l. Upstream End of Guardrail L2L2 Figure Approach Barrier Layout Variables X= (L A – Y) / (L A / L R ) LALA LRLR L A - Y X 27

Level 2 Example- Location 9 L A = 25.4’ L 2 = 13.0’ Y = 13.75’ L R = 360.0’ Length of Need – Formula Solve for X X = (L A – Y) / (L A / L R ) X = (25.4’ – 13.75’) / (25.4’ / 360.0’) X = ’ 28

Level 2 Example- Location 9 Obstacle SF Southface_Foundation_Station = SF SF = ( ) L AOC = Length of AOC = 3.0’ 29

l. Upstream End of Guardrail L2L2 Figure Approach Barrier Layout Variables Point of Need 30

Level 2 Example- Location 9 Point of Need PON = SF – X PON = ( ) – ’ PON = ( ) Length of Need = LON = X + L AOC LON = ’ + 3.0’ LON = ’ 31

Level 2 Example- Location 9 Distance from back of guardrail to foundation= 25.4’(L A )-3.0’(Fnd.)-13.0’(L 2 )-1.76’(Depth of GR)= 7.64’ Therefore, LON ends at downstream end of obstacle. Condition 2, TBG Figure

Level 2 Example- Location 9 Terminals Terminal = Type T2 T2 = 12.5’ (does not count toward length of need) Terminal = Type T1 (Special) T1 = 50.0’ (37.5’ counts toward length of need) Barrier Limits Determination Length of Guardrail L Guardrail = LON – T1 L Guardrail = ’ – 37.5’ L Guardrail = ’ L Guardrail, R = L Guardrail (Round up to the nearest 12.5’ increment) L Guardrail, R = 137.5’ 33

Each AOC shall be analyzed separately. a. Establish EOTWj. Warrant Analysis Level b. Design Speedk. Lateral Offset of Barrier c. Design ADTl. Upstream End of Guardrail d. Length of Runoutm. Upstream End of Barrier Wall e. Shy Line Offset f. Foreslope / Backslope g. Clear Zone h. Clear Zone Adjustment i. Lateral Extent of the Area of Concern 34

Each AOC shall be analyzed separately. a. Establish EOTWj. Warrant Analysis Level b. Design Speedk. Lateral Offset of Barrier c. Design ADTl. Upstream End of Guardrail d. Length of Runoutm. Upstream End of Barrier Wall e. Shy Line Offsetn. Downstream Terminal f. Foreslope / Backslope g. Clear Zone h. Clear Zone Adjustment i. Lateral Extent of the Area of Concern 35

Level 2 Example- Location 9 T2 End_Station = SF + L AOC + T2 T2 End_Station = ( ) + 3’ ’ T2 End_Station = ( ) GR End_Station = Begin T2 Station = End T2 Station – 12.5’ GR End_Station = ( ) – 12.5’ GR End_Station = ( ) GR Begin_Station = GR End_Station – L Guardrail,R GR Begin_Station = ( ) – 137.5’ GR Begin_Station = ( ) T1 Begin_Station = GR Begin_Station – 50’ T1 Station = ( ) – 50’ T1 Begin_Station = ( ) 36

Each AOC shall be analyzed separately. a. Establish EOTWj. Warrant Analysis Level b. Design Speedk. Lateral Offset of Barrier c. Design ADTl. Upstream End of Guardrail d. Length of Runoutm. Upstream End of Barrier Wall e. Shy Line Offsetn. Downstream Terminal f. Foreslope / Backslopeo. Barrier Obstacle g. Clear Zone h. Clear Zone Adjustment i. Lateral Extent of the Area of Concern 37

Barrier Limits Check 12.5’ < |PON- T1 Begin_Station |< 25’ 12.5’ < |( ) – ( )|< 25’ 12.5’ < 19.38’ < 25’ 38

Each AOC shall be analyzed separately. a. Establish EOTWj. Warrant Analysis Level b. Design Speedk. Lateral Offset of Barrier c. Design ADTl. Upstream End of Guardrail d. Length of Runoutm. Upstream End of Barrier Wall e. Shy Line Offsetn. Downstream Terminal f. Foreslope / Backslopeo. Barrier Obstacle g. Clear Zonep. Compare existing length to proposed h. Clear Zone Adjustment i. Lateral Extent of the Area of Concern 39

Each AOC shall be analyzed separately. a. Establish EOTWj. Warrant Analysis Level b. Design Speedk. Lateral Offset of Barrier c. Design ADTl. Upstream End of Guardrail d. Length of Runoutm. Upstream End of Barrier Wall e. Shy Line Offsetn. Downstream Terminal f. Foreslope / Backslopeo. Barrier Obstacle g. Clear Zonep. Compare existing length to proposed h. Clear Zone Adjustmentq. Prepare warrant text and exhibits i. Lateral Extent of the Area of Concern 40

Level 2 Example – Location 9 – Site Plan 41

Questions? 42

Level 2 Example- Location 17 43

Level 2 Example- Location Notes: 1.There is a crash wall in front of the bridge piers. 2.Regrading of the bridge cone is not a feasible alternative.

Each AOC shall be analyzed separately. a. Establish EOTW 45

Each AOC shall be analyzed separately. a. Establish EOTW b. Design Speed 46

Each AOC shall be analyzed separately. a. Establish EOTW b. Design Speed c. Design ADT 47

Each AOC shall be analyzed separately. a. Establish EOTW b. Design Speed c. Design ADT d. Length of Runout 48

d. Length of Runout L2L2 Figure Approach Barrier Layout Variables LRLR 49

d. Length of Runout 50

Each AOC shall be analyzed separately. a. Establish EOTW b. Design Speed c. Design ADT d. Length of Runout e. Shy Line Offset 51

Each AOC shall be analyzed separately. a. Establish EOTW b. Design Speed c. Design ADT d. Length of Runout e. Shy Line Offset f. Foreslope / Backslope 52

Each AOC shall be analyzed separately. a. Establish EOTW b. Design Speed c. Design ADT d. Length of Runout e. Shy Line Offset f. Foreslope / Backslope g. Clear Zone 53

g. Clear Zone Select highest value in range Table 3-1 Clear Zone Distances in Feet from EOTW 54

Each AOC shall be analyzed separately. a. Establish EOTW b. Design Speed c. Design ADT d. Length of Runout e. Shy Line Offset f. Foreslope / Backslope g. Clear Zone h. Clear Zone Adjustment 55

h. Clear Zone Adjustment 56

Level 2 Example- Location 17 Adjusted Clear Zone = 32’ x 1.2 = 38.4’ 57

Each AOC shall be analyzed separately. a. Establish EOTW b. Design Speed c. Design ADT d. Length of Runout e. Shy Line Offset f. Foreslope / Backslope g. Clear Zone h. Clear Zone Adjustment i. Lateral Extent of the Area of Concern 58

i. Lateral Extent of the Area of Concern L2L2 Figure Approach Barrier Layout Variables LALA 59

Level 2 Example- Location 17 Lateral Extent of the Area of Concern L A = L A = 32’ x 1.2 L A = 38.4’ 60

Each AOC shall be analyzed separately. a. Establish EOTWj. Warrant Analysis Level b. Design Speed c. Design ADT d. Length of Runout e. Shy Line Offset f. Foreslope / Backslope g. Clear Zone h. Clear Zone Adjustment i. Lateral Extent of the Area of Concern 61

Flowchart for Analysis of Existing Obstacles (Figure 5.5a) 62

Each AOC shall be analyzed separately. a. Establish EOTWj. Warrant Analysis Level b. Design Speedk. Lateral Offset of Barrier c. Design ADT d. Length of Runout e. Shy Line Offset f. Foreslope / Backslope g. Clear Zone h. Clear Zone Adjustment i. Lateral Extent of the Area of Concern 63

k. Lateral Offset of Barrier L2L2 Figure Approach Barrier Layout Variables L2L2 64

Level 2 Example- Location 17 L A = 38.4’ L 2 = L 2 = 12.0’ (11’ + 1’) 65

Each AOC shall be analyzed separately. a. Establish EOTWj. Warrant Analysis Level b. Design Speedk. Lateral Offset of Barrier c. Design ADTl. Upstream End of Guardrail d. Length of Runout e. Shy Line Offset f. Foreslope / Backslope g. Clear Zone h. Clear Zone Adjustment i. Lateral Extent of the Area of Concern 66

Level 2 Example- Location 17 L A = 38.4’ Lateral Offset of Barrier L 2 = 12.0’ (11’ + 1’) Y = Y = L ’ Y = 12.0’ ’ Y = 12.75’ 67

l. Upstream End of Guardrail < L R LALA L2L2 Y X Figure Example of Barrier Design for Fixed Object on Horizontal Curve Graphical Determination of “X” 68

Level 2 Example- Location 17 L A = 38.4’ L 2 = 12.0’ (11’ + 1’) Y= Y = L ’ Y = 12.0’ ’ = 12.75’ Obstacles BP Bridge_Pier_Station = BPBP = ( ) EC Embankment_Cone_Station = ECEC = ( ) L AOC = BP-EC L AOC = 17.14’ (assumes that EC ends at BP) Length of Need – Graphical Solution Tangent Runout Path from EC = ’ Tangent Runout Path = > L R = 300.0’ Therefore, use L R to determine upstream end of the runout path X = Calculated Graphically = ’ 69

Level 2 Example- Location 17 Point of Need = PON PON = EC – X PON = ( ) – ’ PON = ( ) Length of Need = LON LON = X + L AOC LON = ’ ’ LON = ’ 70

Each AOC shall be analyzed separately. a. Establish EOTWj. Warrant Analysis Level b. Design Speedk. Lateral Offset of Barrier c. Design ADTl. Upstream End of Guardrail d. Length of Runoutm. Upstream End of Barrier Wall e. Shy Line Offset f. Foreslope / Backslope g. Clear Zone h. Clear Zone Adjustment i. Lateral Extent of the Area of Concern 71

Each AOC shall be analyzed separately. a. Establish EOTWj. Warrant Analysis Level b. Design Speedk. Lateral Offset of Barrier c. Design ADTl. Upstream End of Guardrail d. Length of Runoutm. Upstream End of Barrier Wall e. Shy Line Offsetn. Downstream Terminal f. Foreslope / Backslope g. Clear Zone h. Clear Zone Adjustment i. Lateral Extent of the Area of Concern 72

Level 2 Example- Location 17 Terminals Terminal = Type T6B T6B = 43.15’ (counts toward length of need) Terminal = Type T1 (Special) = T1 = 50.0’ (37.5’ counts toward length of need) Barrier Limits Determination Length of Guardrail L Guardrail = LON – T6B – T1 L Guardrail = ’ – 43.15’ – 37.5’ L Guardrail = ’ L Guardrail, R = L Guardrail (Round up to the neareast 12.5’ increment) L Guardrail, R = 112.5’ 73

Level 2 Example- Location 17 T6B End_Station = BP T6B End_Station = ( ) GR End_Station = End T6B Station – 43.15’ GR End_Station = ( ) – 43.15’ GR End_Station = ( ) GR Begin_Station = GR End_Station – L Guardrail,R GR Begin_Station = ( ) – 112.5’ GR Begin_Station = ( ) T1 Begin_Station = GR Begin_Station – 50’ T1 Begin_Station = ( ) – 50’ T1 Begin_Station = ( ) 74

Barrier Limits Check: 12.5’ < |PON – T1 Begin_Station |< 25’ 12.5’ < |( ) – ( )| < 25’ 12.5’ < 21.86’ < 25’ 75

Each AOC shall be analyzed separately. a. Establish EOTWj. Warrant Analysis Level b. Design Speedk. Lateral Offset of Barrier c. Design ADTl. Upstream End of Guardrail d. Length of Runoutm. Upstream End of Barrier Wall e. Shy Line Offsetn. Downstream Terminal f. Foreslope / Backslopeo. Barrier Obstacle g. Clear Zone h. Clear Zone Adjustment i. Lateral Extent of the Area of Concern 76

Each AOC shall be analyzed separately. a. Establish EOTWj. Warrant Analysis Level b. Design Speedk. Lateral Offset of Barrier c. Design ADTl. Upstream End of Guardrail d. Length of Runoutm. Upstream End of Barrier Wall e. Shy Line Offsetn. Downstream Terminal f. Foreslope / Backslopeo. Barrier Obstacle g. Clear Zonep. Compare existing length to proposed h. Clear Zone Adjustment i. Lateral Extent of the Area of Concern 77

Each AOC shall be analyzed separately. a. Establish EOTWj. Warrant Analysis Level b. Design Speedk. Lateral Offset of Barrier c. Design ADTl. Upstream End of Guardrail d. Length of Runoutm. Upstream End of Barrier Wall e. Shy Line Offsetn. Downstream Terminal f. Foreslope / Backslopeo. Barrier Obstacle g. Clear Zonep. Compare existing length to proposed h. Clear Zone Adjustmentq. Prepare warrant text and exhibits i. Lateral Extent of the Area of Concern 78

Level 2 Example- Location 17 – Site Plan 79

Questions? 80

Example-Speed Profile 81

Site Plan 82

Acceleration Table Table 10-3 Minimum Acceleration Lengths for Entrance Terminals with Flat Grades of Two Percent or Less 83

Example-Speed Profile-Site Plan 30 MPH 40 MPH 50 MPH 60 MPH 70 MPH 84

Level 3 Example – Overhead Sign Truss 85

Level 3 Example – Plan 86

Flowchart for Analysis of Proposed Obstacles (Figure 5.5b) 87

New Overhead Sign Truss (Span and Cantilever) Article The Designer shall perform a Level 3 Analysis to determine the most cost-effective design for all new overhead sign installations. The alternatives at minimum to evaluate shall include: (1) base condition – shortest span or arm with shielding; (2) span or arm length which places foundation outside defined clear zone with no shielding or if clear zone is undefined places foundation such that the criteria in Table is met; (3) longer span or arm which places foundation well outside the clear zone with no shielding. 88

Level 3 Example – Overhead Sign Truss Analyze 4 Alternatives for Sign Foundation (Assumes Clear Zone is defined) 1.Base Condition: Foundation Shielded by Guardrail 2.Foundation Beyond Clear Zone, not shielded 3.Foundation on Backslope, not shielded 4.Foundation on Backslope, not shielded (max. length truss) 89

Level 3 Example – Plan 90

Level 3 Example – Cross Section 91

Level 3 Example – Cross Section 92

Level 3 Example – Cross Section 93

Level 3 Example – Cross Section 94

Sign Structure Foundation 95

Level 3 Example – Feature Sketch 96

Level 3 Example – Guardrail Calculation 97

Level 3 Example – Guardrail Calculation 98

Level 3 Example – Guardrail Calculation 99

Level 3 Example – Estimated Costs 100

Cost Tab 101

Highway Tab 102

Segments Tab 103

Features Tab 104

View Pulldown 105

View/ Crash Cost 106

View/ Crash Cost/ KABCO 107

Options/ Units 108

Option/ Edit Feature 109

Option/ Edit Feature 110

Edit Feature 111

Features/ Category 112

Features / Category/ User Defined 113

Feature/ Types 114

RSAP Output 115

RSAP Output 116

RSAP Output 117

RSAP Output 118

RSAP Output 119

RSAP Output 2 vs. 3 3 vs. 4 4 vs is better 4 is better

AOC’s in Close Proximity

14+25 Culvert - AOC # Cantilever Sign- AOC # Upstream Terminal End Downstream Terminal End Upstream Terminal End Downstream Terminal End 92.5’ Gap Total Length of Need = 405’ EOTW AOC’s in Close Proximity 122 PON

Example- AOC Table Format AOC#UPSTREAM US TERM PONDS End of Guardrail DOWNSTREAM DS TERM GAP (FT) OVERLAP (FT)

Summary Calculation LON = AOC #2 DS End of GR – AOC #1 PON = (18+30)-(14+25) = 405’ Terminals DS Terminal= TBT Type T2=T2 US Terminal= TBT Type T1=T1 124

Barrier Limits Determination L Guardrail = LON-T1 = 405’-37.5’ = 367.5’ L G, rounded = 367.5/12.5’ = 29.4, round to 30 sections 30 x 12.5’ = 375’ T2 end = DS End of GR+ 12.5’= ’= Gr end = AOC #2 DS End of GR = Gr begin = Gr end - L G, rounded = ’ = T1 end = Gr begin = T1 begin = T1 end - 50’ = ’ =

Barrier Limits Check 12.5’ < AOC #1 PON – T1 begin < 25’ AOC #1 PON – T1 begin = 20’ Provide a Summary Site Plan 126

14+25 Culvert - AOC # Cantilever Sign- AOC # Upstream Terminal End Downstream Terminal End Upstream Terminal End Downstream Terminal End 142.5’ Gap EOTW AOC’s in Close Proximity 127 PON Length of Need Length of Need

14+25 Culvert - AOC # Cantilever Sign- AOC # Upstream Terminal End Downstream Terminal End Upstream Terminal End Downstream Terminal End 7.5’ Overlap Total Length of Need EOTW AOC’s in Close Proximity 128 PON

Example- AOC Summary Table Format LEGEND POINT OF NEED STATION DOWNSTREAM END OF GUARDRAIL STATION AOC SUMMARY TABLE AOC AOC AOC AOC SUMMARY TOTAL LON15+00 to = 1,200 FT

AOC- Color Coded System

Questions? 131