Tollway Barrier Guidelines Examples Workshop V September-October 2015

Each AOC should be analyzed separately a. Establish EOTWk. Lateral Offset of Barrier b. Design Speedl. Upstream End of Guardrail c. Design ADTm. Downstream End of Barrier d. Runout Lengthn. Length of Need e. Shy Line Offseto. Upstream End of Concrete Barrier f. Foreslope / Backslopep. Barrier Limits Determination g. Clear Zoneq. Barrier Limits Check h. Clear Zone Adjustmentr. Barrier Obstacle i. Lateral Extent of the Area of Concerns. Compare Existing Length to Proposed j. Warrant Analysis Levelt. Prepare Warrant Text and Exhibits 2

Level 2 Example- Location 9 TOLLWAY PROJECT X-XX-XXXX Roadway Reconstruction Tollway M.P. 200 to M.P. 205 Barrier Warrant Analysis DATA SHEET Area of Concern: AOC NB-9 DESCRIPTION OF OBSTACLE Cantilever Sign Sta , 22.4’ from EOTW to Centerline of Foundation Sign Foundation is 6’-0” x 18’-0” grade beam DESIGN CONCEPTS Design Speed = 70 MPH (Tollway Design Speed) ADT = 34,220 (2013) 3

Level 2 Example- Location 9 4

Each AOC should be analyzed separately a. Establish EOTW 5

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

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

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

L2L2 Figure Approach Barrier Layout Variables LRLR 9

Level 2 Example- Location 9 10

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

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

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

h. Clear Zone Adjustment 16

Each AOC should be analyzed separately a. Establish EOTW b. Design Speed c. Design ADT d. Runout Length 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 = 22.4’ + 3.0’ = 25.4’ 19

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

Flowchart for Analysis of Proposed Obstacles (Figure 5.5b) 21

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

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

Level 2 Example- Location 9 L A = 22.4’ + 3.0’ = 25.4’ Lateral Offset of Barrier L 2 = L 2 = 1’ + 11’ + 1’ = 13.0’ 24

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

Level 2 Example- Location 9 L A = 25.4’ L 2 = 13.0’ Y= Y = L ’ Y = 13.0’ ’ Y = 13.69’ 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 = 13.69’ L R = 360.0’ Length of Need – Formula Solve for X X = (L A – Y) / (L A / L R ) X = (25.4’ – 13.69’) / (25.4’ / 360.0’) X = ’ 28

l. Upstream End of Guardrail L2L2 Figure Approach Barrier Layout Variables Point of Need 29

Level 2 Example- Location 9 Point of Need PON = SF – X PON = ( ) – ’ PON = ( ) 30

Level 2 Example- Location 9 Area of Concern (AOC) SF Southface_Foundation_Station = SF SF = ( ) L AOC = Length of AOC = 18.0’ 31

Each AOC should be analyzed separately a. Establish EOTWk. Lateral Offset of Barrier b. Design Speedl. Upstream End of Guardrail c. Design ADTm. Downstream End of Barrier d. Runout Length e. Shy Line Offset f. Foreslope / Backslope g. Clear Zone h. Clear Zone Adjustment i. Lateral Extent of the Area of Concern j. Warrant Analysis Level 32

Level 2 Example- Location 9 Distance from back of guardrail to foundation= 25.4’(L A )-6.0’(Fnd.)-13.0’(L 2 )-1.76’(Depth of GR)= 4.64’ Therefore, LON ends at downstream end of obstacle. Condition 1, TBG Figure

Each AOC should be analyzed separately a. Establish EOTWk. Lateral Offset of Barrier b. Design Speedl. Upstream End of Guardrail c. Design ADTm. Downstream End of Barrier d. Runout Lengthn. Length of Need e. Shy Line Offset f. Foreslope / Backslope g. Clear Zone h. Clear Zone Adjustment i. Lateral Extent of the Area of Concern j. Warrant Analysis Level 34

Level 2 Example- Location 9 (Distance from back of guardrail posts to foundation is 4.64’. Therefore, LON includes 10’ overlap (OL). Length of Need = LON = X + L AOC + OL LON=165.97’ ’ ’ LON = ’ 35

Each AOC should be analyzed separately a. Establish EOTWk. Lateral Offset of Barrier b. Design Speedl. Upstream End of Guardrail c. Design ADTm. Downstream End of Barrier d. Runout Lengthn. Length of Need e. Shy Line Offseto. Upstream End of Concrete Barrier f. Foreslope / Backslope g. Clear Zone h. Clear Zone Adjustment i. Lateral Extent of the Area of Concern j. Warrant Analysis Level 36

Each AOC should be analyzed separately a. Establish EOTWk. Lateral Offset of Barrier b. Design Speedl. Upstream End of Guardrail c. Design ADTm. Downstream End of Barrier d. Runout Lengthn. Length of Need e. Shy Line Offseto. Upstream End of Concrete Barrier f. Foreslope / Backslopep. Barrier Limits Determination g. Clear Zone h. Clear Zone Adjustment i. Lateral Extent of the Area of Concern j. Warrant Analysis Level 37

Level 2 Example- Location 9 Terminals Terminal = Type T2 T2 = 12.5’ (does not count toward length of need) Terminal = Type T1 (Special) T1 = 46.88’ (34.38’ counts toward length of need) Barrier Limits Determination Length of Guardrail L Guardrail = LON – T1(LON contribution) L Guardrail = ’ – 34.38’ L Guardrail = ’ L Guardrail, R = L Guardrail (Round up to the nearest 12.5’ increment) L Guardrail, R = 162.5’ 38

Level 2 Example- Location 9 T2 End_Station = SF + L AOC + OL + T2 T2 End_Station = ( ) + 18’ ’ 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 = ( ) – 162.5’ GR Begin_Station = ( ) T1 Begin_Station = GR Begin_Station – T1 T1 Station = ( ) – 46.88’ T1 Begin_Station = ( ) 39

Each AOC should be analyzed separately a. Establish EOTWk. Lateral Offset of Barrier b. Design Speedl. Upstream End of Guardrail c. Design ADTm. Downstream End of Barrier d. Runout Lengthn. Length of Need e. Shy Line Offseto. Upstream End of Concrete Barrier f. Foreslope / Backslopep. Barrier Limits Determination g. Clear Zoneq. Barrier Limits Check h. Clear Zone Adjustment i. Lateral Extent of the Area of Concern j. Warrant Analysis Level 40

Barrier Limits Check 12.5’ < |PON- T1 Begin_Station |< 25’ 12.5’ < |( ) – ( )|< 25’ 12.5’ < 15.41’ < 25’ 41

Each AOC should be analyzed separately a. Establish EOTWk. Lateral Offset of Barrier b. Design Speedl. Upstream End of Guardrail c. Design ADTm. Downstream End of Barrier d. Runout Lengthn. Length of Need e. Shy Line Offseto. Upstream End of Concrete Barrier f. Foreslope / Backslopep. Barrier Limits Determination g. Clear Zoneq. Barrier Limits Check h. Clear Zone Adjustmentr. Barrier Obstacle i. Lateral Extent of the Area of Concern j. Warrant Analysis Level 42

Each AOC should be analyzed separately a. Establish EOTWk. Lateral Offset of Barrier b. Design Speedl. Upstream End of Guardrail c. Design ADTm. Downstream End of Barrier d. Runout Lengthn. Length of Need e. Shy Line Offseto. Upstream End of Concrete Barrier f. Foreslope / Backslopep. Barrier Limits Determination g. Clear Zoneq. Barrier Limits Check h. Clear Zone Adjustmentr. Barrier Obstacle i. Lateral Extent of the Area of Concerns. Compare Existing Length to Proposed j. Warrant Analysis Level 43

Each AOC should be analyzed separately a. Establish EOTWk. Lateral Offset of Barrier b. Design Speedl. Upstream End of Guardrail c. Design ADTm. Downstream End of Barrier d. Runout Lengthn. Length of Need e. Shy Line Offseto. Upstream End of Concrete Barrier f. Foreslope / Backslopep. Barrier Limits Determination g. Clear Zoneq. Barrier Limits Check h. Clear Zone Adjustmentr. Barrier Obstacle i. Lateral Extent of the Area of Concerns. Compare Existing Length to Proposed j. Warrant Analysis Levelt. Prepare Warrant Text and Exhibits 44

Level 2 Example – Location 9 – Site Plan 45

Questions? 46

Level 2 Example- Location 17 TOLLWAY PROJECT X-XX-XXXX Roadway Rehabilitation Tollway M.P. 200 to M.P. 205 Barrier Warrant Analysis DATA SHEET Areas of Concern (AOC): EB-17A (Embankment Cone) and EB-17B (Bridge Pier) DESCRIPTION OF OBSTACLE  Embankment Cone - Sta to Sta  Blunt End of Crash wall at Bridge Sta , 11’ from EOTW to Pier 47

Level 2 Example- Location 17 DESIGN CONCEPTS  Existing guardrail and terminals do not meet current standards  There is a crash wall in front of the bridge piers.  Concrete Shoulder Barrier Transition (CSBT) is required per Structural Design Manual, Article 11.6, (35’ length, Standard Drawing C4).  Regrading of the bridge cone is not a feasible alternative. Design Speed = 60 MPH (Tollway Design Speed) ADT = 23,490 (2013) 48

Level 2 Example- Location 17 49

Each AOC should be analyzed separately a. Establish EOTW 50

Each AOC should be analyzed separately a. Establish EOTW b. Design Speed 51

Each AOC should be analyzed separately a. Establish EOTW b. Design Speed c. Design ADT 52

Each AOC should be analyzed separately a. Establish EOTW b. Design Speed c. Design ADT d. Runout Length 53

d. Runout Length L2L2 Figure Approach Barrier Layout Variables LRLR 54

d. Runout Length 55

Design Concepts Concrete Shoulder Barrier Transition (CSBT) is required per Structural Design Manual, Article 11.6, 35’ length.  Standard Drawing C4. Regrading of the bridge cone is not a feasible alternative. 56

Concrete Shoulder Barrier Transition 57

Transverse Slopes at Existing Bridge Cones Within the clear zone, the maximum unshielded transverse slope allowed to face traffic shall be 1:10 (V:H) and the maximum transverse slope facing away from approaching traffic shall be 1:4 (V:H). 58

Each AOC should be analyzed separately a. Establish EOTW b. Design Speed c. Design ADT d. Runout Length e. Shy Line Offset 59

Each AOC should be analyzed separately a. Establish EOTW b. Design Speed c. Design ADT d. Runout Length e. Shy Line Offset f. Foreslope / Backslope 60

Each AOC should be analyzed separately a. Establish EOTW b. Design Speed c. Design ADT d. Runout Length e. Shy Line Offset f. Foreslope / Backslope g. Clear Zone 61

g. Clear Zone Select highest value in range Table 3-1 Clear Zone Distances in Feet from EOTW 62

Each AOC should be analyzed separately a. Establish EOTW b. Design Speed c. Design ADT d. Runout Length e. Shy Line Offset f. Foreslope / Backslope g. Clear Zone h. Clear Zone Adjustment 63

h. Clear Zone Adjustment 64

Level 2 Example- Location 17 Adjusted Clear Zone = 32’ x 1.2 = 38.4’ 65

Each AOC should be analyzed separately a. Establish EOTW b. Design Speed c. Design ADT d. Runout Length e. Shy Line Offset f. Foreslope / Backslope g. Clear Zone h. Clear Zone Adjustment i. Lateral Extent of the Area of Concern 66

i. Lateral Extent of the Area of Concern L2L2 Figure Approach Barrier Layout Variables LALA 67

Level 2 Example- Location 17 Lateral Extent of the Area of Concern L A = L c = 38.4’ 68

Lateral Extent of the Area of Concern L A =38.4’ EOTW 69

Each AOC should be analyzed separately a. Establish EOTW b. Design Speed c. Design ADT d. Runout Length e. Shy Line Offset f. Foreslope / Backslope g. Clear Zone h. Clear Zone Adjustment i. Lateral Extent of the Area of Concern j. Warrant Analysis Level 70

Flowchart for Analysis of Existing Obstacles (Figure 5.5a) 71

Each AOC should be analyzed separately a. Establish EOTWk. Lateral Offset of Barrier b. Design Speed c. Design ADT d. Runout Length e. Shy Line Offset f. Foreslope / Backslope g. Clear Zone h. Clear Zone Adjustment i. Lateral Extent of the Area of Concern j. Warrant Analysis Level 72

k. Lateral Offset of Barrier L2L2 Figure Approach Barrier Layout Variables L2L2 73

Level 2 Example- Location 17 L A = 38.4’ L 2 = L 2 = 12.0’ (11’ + 1’) 74

Each AOC should be analyzed separately a. Establish EOTWk. Lateral Offset of Barrier b. Design Speedl. Upstream End of Guardrail c. Design ADT d. Runout Length e. Shy Line Offset f. Foreslope / Backslope g. Clear Zone h. Clear Zone Adjustment i. Lateral Extent of the Area of Concern j. Warrant Analysis Level 75

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 = 12.69’ 76

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” 77

Level 2 Example- Location 17 L A = 38.4’ L 2 = 12.0’ (11’ + 1’) Y= Y = L ’ Y = 12.0’ ’ = 12.69’ Areas of Concern Crash Wall Upstream Station = CW Station CW Station = ( ) 78

Level 2 Example- Location 17 L A = 38.4’ L 2 = 12.0’ (11’ + 1’) Y= Y = L ’ Y = 12.0’ ’ = 12.69’ Areas of Concern Crash Wall Upstream Station = CW Station CW Station = ( ) Embankment Cone (EC) Upstream Station = EC US EC US = ( ) Embankment Cone (EC) Downstream Station = EC DS EC DS = ( ) 79

Level 2 Example- Location 17 L A = 38.4’ L 2 = 12.0’ (11’ + 1’) Y= Y = L ’ Y = 12.0’ ’ = 12.69’ Areas of Concern Crash Wall Upstream Station = CW Station CW Station = ( ) Embankment Cone (EC) Upstream Station = EC US EC US = ( ) Embankment Cone (EC) Downstream Station = EC DS EC DS = ( ) Length of EC = EC DS - EC US = ( ) - ( ) EC = 34.87’ L AOC = Length of AOC = EC L AOC = 34.87’ 80

Area of Concern-Embankment Cone Upstream and Downstream limits L A =38.4’ EOTW EC US = ( ) EC DS = ( ) 81

Level 2 Example- Location 17 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 X= ’ 82

Level 2 Example- Location 17 Point of Need = PON Point of Need= PON= EC US – X PON= ( ) – ’ PON = ( ) 83

Each AOC should be analyzed separately a. Establish EOTWk. Lateral Offset of Barrier b. Design Speedl. Upstream End of Guardrail c. Design ADTm. Downstream End of Barrier d. Runout Length e. Shy Line Offset f. Foreslope / Backslope g. Clear Zone h. Clear Zone Adjustment i. Lateral Extent of the Area of Concern j. Warrant Analysis Level 84

Each AOC should be analyzed separately a. Establish EOTWk. Lateral Offset of Barrier b. Design Speedl. Upstream End of Guardrail c. Design ADTm. Downstream End of Barrier d. Runout Lengthn. Length of Need e. Shy Line Offset f. Foreslope / Backslope g. Clear Zone h. Clear Zone Adjustment i. Lateral Extent of the Area of Concern j. Warrant Analysis Level 85

Level 2 Example- Location 17 Length of Need = LON Length of Need = LON = X + L AOC LON = ’ ’ LON = ’ 86

Each AOC should be analyzed separately a. Establish EOTWk. Lateral Offset of Barrier b. Design Speedl. Upstream End of Guardrail c. Design ADTm. Downstream End of Barrier d. Runout Lengthn. Length of Need e. Shy Line Offseto. Upstream End of Concrete Barrier f. Foreslope / Backslope g. Clear Zone h. Clear Zone Adjustment i. Lateral Extent of the Area of Concern j. Warrant Analysis Level 87

Each AOC should be analyzed separately a. Establish EOTWk. Lateral Offset of Barrier b. Design Speedl. Upstream End of Guardrail c. Design ADTm. Downstream End of Barrier d. Runout Lengthn. Length of Need e. Shy Line Offseto. Upstream End of Concrete Barrier f. Foreslope / Backslopep. Barrier Limits Determination g. Clear Zone h. Clear Zone Adjustment i. Lateral Extent of the Area of Concern j. Warrant Analysis Level 88

Level 2 Example- Location 17 Barrier Limits Determination Concrete Shoulder Barrier Transition = CBST CSBT = 35’ CSBT Station = CW Station - CSBT = ( ) – 35’ CSBT Station = ( ) Lengths of Crash Wall (EC DS - CW Station ) and CSBT also contribute to Length of Need Length of Crash Wall = CW = EC DS - CW Station CW = ( ) – ( ) CW = 17.73’ Length of Guardrail = L Guardrail = LON - CW - CSBT - T6B - T1 L Guardrail = ’ ’ - 35’ ’ ’ L Guardrail = 71.69’ L Guardrail, R = L Guardrail (Round up to the nearest 12.5’ increment) L Guardrail, R = 75.0’ 89

Level 2 Example- Location 17 Terminals Terminal = Type T6B T6B = 58.15’ (43.15’ counts toward length of need) Terminal = Type T1 (Special) T1 = 46.88’ (34.38’ counts toward length of need) 90

Level 2 Example- Location 17 T6B End_Station = CSBT Station + 15’ T6B End_Station = ( ) + 15’ T6B End_Station = ( ) T6B Begin_Station = CSBT Station – 43.15’ T6B Begin_Station = ( ) – 43.15’ T6B Begin_Station = ( ) GR End_Station = T6B Begin_Station GR End_Station = ( ) GR Begin_Station = GR End_Station – L Guardrail,R GR Begin_Station = ( ) – 75.0’ GR Begin_Station = ( ) T1 Begin_Station = GR Begin_Station – 46.88’ T1 Begin_Station = ( ) – 46.88’ T1 Begin_Station = ( ) 91

Each AOC should be analyzed separately a. Establish EOTWk. Lateral Offset of Barrier b. Design Speedl. Upstream End of Guardrail c. Design ADTm. Downstream End of Barrier d. Runout Lengthn. Length of Need e. Shy Line Offseto. Upstream End of Concrete Barrier f. Foreslope / Backslopep. Barrier Limits Determination g. Clear Zoneq. Barrier Limits Check h. Clear Zone Adjustment i. Lateral Extent of the Area of Concern j. Warrant Analysis Level 92

Barrier Limits Check: 12.5’ < |PON – T1 Begin_Station |< 25’ 12.5’ < |( ) – ( )| < 25’ 12.5’ < 15.81’ < 25’ 93

Each AOC should be analyzed separately a. Establish EOTWk. Lateral Offset of Barrier b. Design Speedl. Upstream End of Guardrail c. Design ADTm. Downstream End of Barrier d. Runout Lengthn. Length of Need e. Shy Line Offseto. Upstream End of Concrete Barrier f. Foreslope / Backslopep. Barrier Limits Determination g. Clear Zoneq. Barrier Limits Check h. Clear Zone Adjustmentr. Barrier Obstacle i. Lateral Extent of the Area of Concern j. Warrant Analysis Level 94

Each AOC should be analyzed separately a. Establish EOTWk. Lateral Offset of Barrier b. Design Speedl. Upstream End of Guardrail c. Design ADTm. Downstream End of Barrier d. Runout Lengthn. Length of Need e. Shy Line Offseto. Upstream End of Concrete Barrier f. Foreslope / Backslopep. Barrier Limits Determination g. Clear Zoneq. Barrier Limits Check h. Clear Zone Adjustmentr. Barrier Obstacle i. Lateral Extent of the Area of Concerns. Compare Existing Length to Proposed j. Warrant Analysis Level 95

Compare Existing Length to Proposed Compare Existing Guardrail Length to Proposed:  Existing (with terminals): ’  Proposed (with terminals): ’ Proposed length of guardrail is less than the existing length due to both the shorter L R length in the current AASHTO Roadside Design Guide (2011), Table 5-10b, and the addition of 35’ of Concrete Shoulder Barrier Transition. 96

Each AOC should be analyzed separately a. Establish EOTWk. Lateral Offset of Barrier b. Design Speedl. Upstream End of Guardrail c. Design ADTm. Downstream End of Barrier d. Runout Lengthn. Length of Need e. Shy Line Offseto. Upstream End of Concrete Barrier f. Foreslope / Backslopep. Barrier Limits Determination g. Clear Zoneq. Barrier Limits Check h. Clear Zone Adjustmentr. Barrier Obstacle i. Lateral Extent of the Area of Concerns. Compare Existing Length to Proposed j. Warrant Analysis Levelt. Prepare Warrant Text and Exhibits 97

Level 2 Example- Location 17 – Site Plan 98

Questions? 99

Acceleration Example-Speed Profile 100

Site Plan 101

Acceleration Table Table 10-3 Minimum Acceleration Lengths for Entrance Terminals with Flat Grades of Two Percent or Less 102

Example-Speed Profile-Site Plan 30 MPH 40 MPH 50 MPH 60 MPH 70 MPH 103

Deceleration Example-Speed Profile 104

Deceleration Example-Speed Profile 105

Deceleration Example-Speed Profile 106

Deceleration Example-Speed Profile MPH 60 MPH 50 MPH 40 MPH

RSAP Guidance 108

RSAP Guidance (General) 109 Considers: Initial Construction Costs Maintenance Costs Predicts Crash Costs Compares 2 or more alternatives

RSAP Guidance (General) 110 Simulates one encroachment at a time using randomly generated conditions. Encroachment frequency generally increases as the ADT increases.

RSAP Guidance (Benefit /Cost Analysis) B Crash $’s C Direct $’s 111 =

RSAP Vehicle Encroachment 112 Median Slope Feature 1 Slope Feature 3 Slope Feature 2 Rigid Object Feature Vehicle Types 49 Combinations of V 0 and 0 Vehicle Path: Straight and No braking V0V0 Shoulder

RSAP Guidance (Roadway Segments) Split based on:  Vertical Grade (if downgrade > 2%)  Horizontal Curve (if R < 1910’) 113

RSAP Guidance (Crash Costs) K Fatal $ 5,000,000 A $ 500,000 B Injury $ 100,000 C $ 30,000 O PDO $ 6,000 Note that these $’s are different than the default values and need to be input by the user. 114 (Property damage only)

RSAP Guidance (Features) Category Type Foreslope54 Backslope25 Intersecting Slope90 Fixed Object34 Culvert End35 Longitudinal Barrier17 Terminal & Crash Cushion11 115

Level 3 Example 116 Overhead Sign Structure Span Type

Level 3 Example – Plan 117

Flowchart for Analysis of Proposed Obstacles (Figure 5.5b) 118

New Overhead Sign Truss, Article Designer shall perform a Level 3 Analysis to determine the most cost-effective design for all new overhead sign installations. 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. 119

Level 3 Example-Sign Structure Alternatives for Foundation Alternative 1 (Base Condition)  95' span length  Foundation within clear zone and shielded Alternative 2  105' span length  Foundation just outside clear zone and unshielded Alternative 3  115' span length  Foundation well outside clear zone and unshielded Because all three alternatives are feasible, a level 3 analysis will be performed.

Sign Structure Foundation Details 121 Foundation 3.5’ x 18.0’

Level 3 Example – Feature Sketch-Alt

Level 3 Example – Feature Sketch-Alt

Level 3 Example – Feature Sketch-Alt

Level 3 Example – Feature Sketch-Alt

Level 3 Example – Feature Sketch-Alt

Level 3 Example – Feature Sketch-Alt

Level 3 Example – Guardrail Calculation 128 TOLLWAY PROJECT NO. RR-XX-XXXX Roadway Reconstruction Tollway M.P. 200 to M.P. 205 Barrier Warrant Analysis DATA SHEET Area of Concern:E074 DESCRIPTION OF OBSTACLE Sign truss foundation (AOC E074) at Sta The foundation is 18.0' long (parallel to traffic) by 3.5' wide. The full 18' length of foundation is considered an obstacle. This analysis is to determine the shielding required for Alternative #1. DESIGN CONCEPTS Design Speed =70 MPH (Mainline design speed) ADT =74,759 (2013 Tollway Traffic Data Report, pg. A-14) Clear Zone (L C ) = 30’ based on 1:6 backslope (Table 3-1 AASHTO Roadside Design Guide 2011) Tangent section; no horizontal curve adjustments necessary. Runout length (L R ) = 360 ft. (from Table 5-10b AASHTO Roadside Design Guide 2011) Stationing increases going downstream.

Level 3 Example – Guardrail Calculation 129 Area of Concern E074 Sign Truss Foundation Alternative 1 L 3 = 25.75’ L A = L ’ = 29.25’ L 2 = 15’ + 1’ ’ = 18.23’ L R = 360.0’ Y = L ’ Y = 18.92’

Level 3 Example – Guardrail Calculation 130 Area of Concern (AOC) USF Sign Truss Fndn_Upstream_Station = USF USF = L AOC = Length of AOC = 18.0' DSF Sign Truss Fndn_Downstream_Station = DSF DSF = Length of Need - Formula X = (L A – Y) / (L A / L R ) = (29.25 – 18.92) / (29.25 / 360) = X = ' Point of Need = PON = USF – X PON = ' PON =

Level 3 Example – Guardrail Calculation 131 Downstream Condition: Offset: back of guardrail to face of foundation = 5.76' Therefore, Condition 1 applies (See TBG Figure 5.12) Overlap Distance = OL = 10.0' Length of Need = LON = X + L AOC + OL LON = ' ' ' = '

Level 3 Example – Guardrail Calculation 132 Proposed Guardrail Terminals Downstream End Terminal = Type T2 T2 = 12.5' (0' counts toward length of need) Upstream End Terminal = Type T1 (Special) T1 = 46.88' (34.38' counts toward length of need)

Level 3 Example – Guardrail Calculation 133 Barrier Limits Determination Length of Guardrail = L Guardrail = LON – T1 (LON contribution) L Guardrail = ' ' L Guardrail = ' L Guardrail, R = L Guardrail (Round up to nearest 12.5' increment) L Guardrail, R = 125.0' Minimum length check: Okay T2 End_Station = DSF + OL + T2 T2 End_Station = ' ' T2 End_Station = ( ) GR End_Station = T2 Begin_Station = T2 End_Station – T2 GR End_Station = ' GR End_Station = ( )

Level 3 Example – Guardrail Calculation 134 GR Begin_Station = GR End_Station – L Guardrail,R GR Begin_Station = ' GR Begin_Station = ( ) T1 Begin_Station = GR Begin_Station – T1 T1 Begin_Station = ' T1 Begin_Station = ( ) Recovery Area Check: There are no objects within the recovery area. Barrier Limits Check: 12.5’ < PON – T1 Begin_Station < 25’ 12.5 < ( ) - ( ) < 25' 12.5 OK Existing Guardrail v. Proposed condition (including terminals) No existing guardrail Recommendation: Install guardrail and terminals to stations listed above, pending results of Level 3 analysis.

Level 3 Example – Plan 135

Level 3 Example – Estimated Costs 136

Cost Tab 137

Highway Tab 138

Segments Tab 139

Features Tab 140

Highway Tab-View Pulldown 141

View/ Crash Cost 142

View/ Crash Cost/ KABCO 143

Options/ Units 144

Option/ Edit Feature 145

Option/ Edit Feature 146 UPDATE

Edit Feature 147

Features/ Category 148

Features / Category/ User Defined 149

Feature/ Types 150

RSAP Output 151

RSAP Output 152

RSAP Output 153

RSAP Output 154

RSAP Output 155

RSAP Output 156

RSAP Output vs. 1  2 is better 2 vs. 3  3 is better  Select Alternative #3 Recommendation: Install 115' sign truss span. Do not shield sign foundation.

Benefit/Cost Ratio Report - Sample #1 File Name: Sample RSAP Project #1 Project Description: Sample RSAP Project #1 AlternativeDescription 1Base condition. Minimum length of guardrail shielding sign truss foundation. 2Unshielded sign foundation just outside the clear zone. 3Unshielded sign foundation well outside the clear zone. Alternative Pair-Wise Comparison There is no pair-wise comparison that exceeds the threshold value of 1.5. Therefore, there is no alternative that is superior to the base condition. Select Alternative #1. 158

Benefit/Cost Ratio Report - Sample #2 File Name: Sample RSAP Project #2 Project Description: Sample RSAP Project #2 AlternativeDescription 1Base condition. Minimum length of guardrail shielding sign truss foundation. 2Unshielded sign foundation just outside the clear zone. 3Unshielded sign foundation well outside the clear zone. Alternative Pair-Wise Comparison 1) Alt. 1 vs. Alt. 2 has a positive B/C ratio (25.11), greater than 1.5. Alt. 2 is better. 3) Alt. 2 vs. Alt. 3 has a positive B/C ratio (1.07), but is less than 1.5. Alt. 2 is better. Select Alternative #2. Note that you do not compare the numbers and in the first row to each other. Alts 2 & 3 are compared directly in the second row. 159

Benefit/Cost Ratio Report - Sample #3 File Name: Sample RSAP Project #3 Project Description: Sample RSAP Project #3 AlternativeDescription 1Base condition. Minimum length of guardrail shielding sign truss foundation. 2Unshielded sign foundation just outside the clear zone. 3Unshielded sign foundation 10' outside the clear zone. 4Unshielded sign foundation 20' outside the clear zone. Alternative Pair-Wise Comparison 1) Alt. 1 vs. Alt. 2 has a positive B/C ratio (2.17). Alt. 2 is better. 2) Alt. 2 vs. Alt. 3 has a positive B/C ratio (4.23), greater than 1.5. Alt. 3 is better. 3) Alt. 3 vs. Alt. 4 has a positive B/C ratio (1.10), but is less than 1.5. Alt. 3 is better. Select Alternative #3. 160

Questions? 161

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