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Roadside Benefit/Cost Assessment - Reduction in Accident Costs

This program calculates the benefit/cost ratio of reducing accident costs through roadside improvements. It considers construction and maintenance costs, societal costs, severity levels, and traffic parameters.

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Roadside Benefit/Cost Assessment - Reduction in Accident Costs

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  1. Roadside - Benefit – Cost assessment See credit below: Thomas Bane Thomas R. Bane P.E. 605 Suwannee Street Mail-station 32 Tallahassee Florida 32399 (850) 414-4379 thomas.bane@dot.state.fl.us

  2. Benefit / Cost Ratio Reduction in Accident Costs R(b/c) = Increase in Construction & Maintenance Costs

  3. Roadside Guide Roadside Guide Design Design NCHRP RSAP Technical Advisory RS 5.0 Non-Restricted Roadways

  4. Technical Advisory ROADSIDE 5.0 Societal Costs/Severity Level

  5. C:> _ roadside.exe Roadside Program is a DOS based program – Get acquainted with this Type of message! DO YOU WISH TO ENABLE THE PRINTER (Y/N)? Y

  6. Technical Advisory GLOBAL PARAMETER VALUES 1. FATAL ACCIDENT COST = $ 1,000,000 2. SEVERE INJURY ACCIDENT COST = $ 200,000 3. MODERATE INJURY ACCIDENT COST = $ 12,500 4. SLIGHT INJURY ACCIDENT COST = $ 3,750 5. PDO LEVEL 2 ACCIDENT COST = $ 3,125 6. PDO LEVEL 1 ACCIDENT COST = $ 625 7. ENCROACHMENT RATE = 0.0003000 ENCROACHMENTS/km/YR/VPD 8. 50 km/h DES SPEED ENC ANGLE = 13.0 DEG AND TRAF VOL CAP = 24000 VPD/LANE 9. 60 km/h DES SPEED ENC ANGLE = 12.8 DEG AND TRAF VOL CAP = 23900 VPD/LANE 10. 70 km/h DES SPEED ENC ANGLE = 12.4 DEG AND TRAF VOL CAP = 23700 VPD/LANE 11. 80 km/h DES SPEED ENC ANGLE = 12.0 DEG AND TRAF VOL CAP = 23300 VPD/LANE 12. 90 km/h DES SPEED ENC ANGLE = 11.6 DEG AND TRAF VOL CAP = 22800 VPD/LANE 13. 100 km/h DES SPEED ENC ANGLE = 11.1 DEG AND TRAF VOL CAP = 22000 VPD/LANE 14. 110 km/h DES SPEED ENC ANGLE = 10.7 DEG AND TRAF VOL CAP = 21000 VPD/LANE 15. 120 km/h DES SPEED ENC ANGLE = 10.3 DEG AND TRAF VOL CAP = 20000 VPD/LANE 16. SWATH WIDTH = 3.600 m 17. RESET ALL GLOBALS TO DEFAULT STARTUP VALUES. DO YOU WISH TO CHANGE A PARAMETER VALUE (Y/N)? Y

  7. GLOBAL PARAMETER VALUES 1. FATAL ACCIDENT COST = $ 2,600,000 2. SEVERE INJURY ACCIDENT COST = $ 505,000 3. MODERATE INJURY ACCIDENT COST = $ 165,000 4. SLIGHT INJURY ACCIDENT COST = $ 36,167 5. PDO LEVEL 2 ACCIDENT COST = $ 10,469 6. PDO LEVEL 1 ACCIDENT COST = $ 2,000 7. ENCROACHMENT RATE = 0.0003000 ENCROACHMENTS/km/YR/VPD 8. 50 km/h DES SPEED ENC ANGLE = 13.0 DEG AND TRAF VOL CAP = 24000 VPD/LANE 9. 60 km/h DES SPEED ENC ANGLE = 12.8 DEG AND TRAF VOL CAP = 23900 VPD/LANE 10. 70 km/h DES SPEED ENC ANGLE = 12.4 DEG AND TRAF VOL CAP = 23700 VPD/LANE 11. 80 km/h DES SPEED ENC ANGLE = 12.0 DEG AND TRAF VOL CAP = 23300 VPD/LANE 12. 90 km/h DES SPEED ENC ANGLE = 11.6 DEG AND TRAF VOL CAP = 22800 VPD/LANE 13. 100 km/h DES SPEED ENC ANGLE = 11.1 DEG AND TRAF VOL CAP = 22000 VPD/LANE 14. 110 km/h DES SPEED ENC ANGLE = 10.7 DEG AND TRAF VOL CAP = 21000 VPD/LANE 15. 120 km/h DES SPEED ENC ANGLE = 10.3 DEG AND TRAF VOL CAP = 20000 VPD/LANE 16. SWATH WIDTH = 3.600 m 17. RESET ALL GLOBALS TO DEFAULT STARTUP VALUES. DO YOU WISH TO CHANGE A PARAMETER VALUE (Y/N)? N

  8. CURRENT SEVERITY INDEX versus COST RELATIONSHIP SEVERITY INDEX COST 0.0 $ 0 0.5 $ 2,000 1.0 $ 10,250 2.0 $ 26,940 3.0 $ 82,498 4.0 $ 170,041 5.0 $ 342,277 6.0 $ 639,870 7.0 $ 981,526 8.0 $ 1,469,147 9.0 $ 2,052,450 10.0 $ 2,600,000 PRESS ENTER TO CONTINUE

  9. Societal Costs $981,562.00 SI=7.0

  10. Property Damage Only Non-Fatal Injuries % Accidents Fatalities

  11. PRINT STORE RECALL HELP GLOBAL SI v $ DIR SI DEF GRAPH QUIT 1. TITLE: 2. TRAFFIC VOLUME = 38,900 VPD - TRAFFIC GROWTH RATE = 0.650 % PER YEAR 3. DIVIDED HIGHWAY TOTAL LANE(S) = 6 LANE WIDTH = 3.300 m 4. CURVATURE (RADIUS IN METERS) = %999,999 GRADE (PERCENT) = 0.0 5. EFFECTIVE BASELINE CURVATURE GRADE USER TOTAL TRAFFIC VPD ENC/km/YR FACTOR FACTOR FACTOR ENC/km/YR ADJACENT 19,450 5.8350 1.00 1.00 1.00 5.8350 OPPOSING 19,450 0.0000 1.00 1.00 1.00 0.0000 6. DESIGN SPEED = 70 km/h ENC ANGLE = 12.4 DEG ADT CAP = 23,700 VPD/LANE 7. OFFSET (A) = 3.020 m LENGTH (L) = 0.500 m WIDTH (W) = 0.500 m 8. INITIAL COLLISION FREQUENCY = 0.02615 IMPACTS/YEAR ADJACENT CFTA = 0.0261 CFSU = 0.0018 CFCU = 0.0233 CFFA = 0.0011 OPPOSING CFTO = 0.0000 CFSD = 0.0000 CFCD = 0.0000 CFFO = 0.0000 9. SEVERITY INDEX = SU= 4.40 SD= 2.00 CU= 4.40 CD= 1.00 FACE= 2.20 ACCIDENT COST $ 238,935 $ 26,940 $ 238,935 $ 10,250 $ 38,051 0. PROJECT LIFE = 13 YR DISCOUNT RATE = 7.000 %/YR TRAFFIC CUTOFF YR = 200 CRF = 0.11965 KC = 8.66693 KT = 8.35765 KJ = 0.41496 1. INSTALLATION COST = $ 35,000 SALVAGE VALUE = $ 0 2. REPAIR COST/ACC $ SU= 2000 SD= 1000 CU= 2000 CD= 1000 F= 1000 3. MAINTENANCE COST/YR = $ 100 4. PRESENT WORTH = $ 88,590 ANNUALIZED $ 10,600 ACCIDENT COST = $ 52,310 ANNUALIZED $ 6,259 HIGHWAY DEPT. COST = $ 36,280 ANNUALIZED $ 4,341 O CHANGE OR ACCESS: INPUT ITEM NUM. OR FUNCTION KEY (SEE BELOW) PLUS ENTER.

  12. Actual Horizontal Offset

  13. Efficiency Factors: Slope => Es = 1+ slope/0.4 Vaulting => Frnd = 1+ D slope Dslope-brake = -17.34 m (Dslope) Effective Offset Actual Horizontal Offset

  14. 1. TITLE: 2. TRAFFIC VOLUME = 38,900 VPD - TRAFFIC GROWTH RATE = 0.650 % PER YEAR 3. DIVIDED HIGHWAY TOTAL LANE(S) = 6 LANE WIDTH = 3.300 m 4. CURVATURE (RADIUS IN METERS) = %999,999 GRADE (PERCENT) = 0.0 5. EFFECTIVE BASELINE CURVATURE GRADE USER TOTAL TRAFFIC VPD ENC/km/YR FACTOR FACTOR FACTOR ENC/km/YR ADJACENT 19,450 5.8350 1.00 1.00 1.00 5.8350 OPPOSING 19,450 0.0000 1.00 1.00 1.00 0.0000 6. DESIGN SPEED = 70 km/h ENC ANGLE = 12.4 DEG ADT CAP = 23,700 VPD/LANE 7. OFFSET (A) = 3.020 m LENGTH (L) = 0.500 m WIDTH (W) = 0.500 m 8. INITIAL COLLISION FREQUENCY = 0.02615 IMPACTS/YEAR ADJACENT CFTA = 0.0261 CFSU = 0.0018 CFCU = 0.0233 CFFA = 0.0011 OPPOSING CFTO = 0.0000 CFSD = 0.0000 CFCD = 0.0000 CFFO = 0.0000 9. SEVERITY INDEX = SU= 4.40 SD= 2.00 CU= 4.40 CD= 1.00 FACE= 2.20 ACCIDENT COST $ 238,935 $ 26,940 $ 238,935 $ 10,250 $ 38,051 0. PROJECT LIFE = 13 YR DISCOUNT RATE = 7.000 %/YR TRAFFIC CUTOFF YR = 200 CRF = 0.11965 KC = 8.66693 KT = 8.35765 KJ = 0.41496 1. INSTALLATION COST = $ 35,000 SALVAGE VALUE = $ 0 2. REPAIR COST/ACC $ SU= 2000 SD= 1000 CU= 2000 CD= 1000 F= 1000 3. MAINTENANCE COST/YR = $ 100 4. PRESENT WORTH = $ 88,590 ANNUALIZED $ 10,600 ACCIDENT COST = $ 52,310 ANNUALIZED $ 6,259 HIGHWAY DEPT. COST = $ 36,280 ANNUALIZED $ 4,341 O CHANGE OR ACCESS: INPUT ITEM NUM. OR FUNCTION KEY (SEE BELOW) PLUS ENTER. PRINT STORE RECALL HELP GLOBAL SI v $ DIR SI DEF GRAPH QUIT

  15. 1. TITLE: 2. TRAFFIC VOLUME = 38,900 VPD - TRAFFIC GROWTH RATE = 0.650 % PER YEAR 3. DIVIDED HIGHWAY TOTAL LANE(S) = 6 LANE WIDTH = 3.300 m 4. CURVATURE (RADIUS IN METERS) = %999,999 GRADE (PERCENT) = 0.0 5. EFFECTIVE BASELINE CURVATURE GRADE USER TOTAL TRAFFIC VPD ENC/km/YR FACTOR FACTOR FACTOR ENC/km/YR ADJACENT 19,450 5.8350 1.00 1.00 1.00 5.8350 OPPOSING 19,450 0.0000 1.00 1.00 1.00 0.0000 6. DESIGN SPEED = 70 km/h ENC ANGLE = 12.4 DEG ADT CAP = 23,700 VPD/LANE 7. OFFSET (A) = 3.020 m LENGTH (L) = 0.500 m WIDTH (W) = 0.500 m 8. INITIAL COLLISION FREQUENCY = 0.02615 IMPACTS/YEAR ADJACENT CFTA = 0.0261 CFSU = 0.0018 CFCU = 0.0233 CFFA = 0.0011 OPPOSING CFTO = 0.0000 CFSD = 0.0000 CFCD = 0.0000 CFFO = 0.0000 9. SEVERITY INDEX = SU= 4.40 SD= 2.00 CU= 4.40 CD= 1.00 FACE= 2.20 ACCIDENT COST $ 238,935 $ 26,940 $ 238,935 $ 10,250 $ 38,051 0. PROJECT LIFE = 13 YR DISCOUNT RATE = 7.000 %/YR TRAFFIC CUTOFF YR = 200 CRF = 0.11965 KC = 8.66693 KT = 8.35765 KJ = 0.41496 1. INSTALLATION COST = $ 35,000 SALVAGE VALUE = $ 0 2. REPAIR COST/ACC $ SU= 2000 SD= 1000 CU= 2000 CD= 1000 F= 1000 3. MAINTENANCE COST/YR = $ 100 4. PRESENT WORTH = $ 88,590 ANNUALIZED $ 10,600 ACCIDENT COST = $ 52,310 ANNUALIZED $ 6,259 HIGHWAY DEPT. COST = $ 36,280 ANNUALIZED $ 4,341 O CHANGE OR ACCESS: INPUT ITEM NUM. OR FUNCTION KEY (SEE BELOW) PLUS ENTER. PRINT STORE RECALL HELP GLOBAL SI v $ DIR SI DEF GRAPH QUIT

  16. 1. TITLE: 2. TRAFFIC VOLUME = 38,900 VPD - TRAFFIC GROWTH RATE = 0.650 % PER YEAR 3. DIVIDED HIGHWAY TOTAL LANE(S) = 6 LANE WIDTH = 3.300 m 4. CURVATURE (RADIUS IN METERS) = %999,999 GRADE (PERCENT) = 0.0 5. EFFECTIVE BASELINE CURVATURE GRADE USER TOTAL TRAFFIC VPD ENC/km/YR FACTOR FACTOR FACTOR ENC/km/YR ADJACENT 19,450 5.8350 1.00 1.00 1.00 5.8350 OPPOSING 19,450 0.0000 1.00 1.00 1.00 0.0000 6. DESIGN SPEED = 70 km/h ENC ANGLE = 12.4 DEG ADT CAP = 23,700 VPD/LANE 7. OFFSET (A) = 3.020 m LENGTH (L) = 0.500 m WIDTH (W) = 0.500 m 8. INITIAL COLLISION FREQUENCY = 0.02615 IMPACTS/YEAR ADJACENT CFTA = 0.0261 CFSU = 0.0018 CFCU = 0.0233 CFFA = 0.0011 OPPOSING CFTO = 0.0000 CFSD = 0.0000 CFCD = 0.0000 CFFO = 0.0000 9. SEVERITY INDEX = SU= 4.40 SD= 2.00 CU= 4.40 CD= 1.00 FACE= 2.20 ACCIDENT COST $ 238,935 $ 26,940 $ 238,935 $ 10,250 $ 38,051 0. PROJECT LIFE = 13 YR DISCOUNT RATE = 7.000 %/YR TRAFFIC CUTOFF YR = 200 CRF = 0.11965 KC = 8.66693 KT = 8.35765 KJ = 0.41496 1. INSTALLATION COST = $ 35,000 SALVAGE VALUE = $ 0 2. REPAIR COST/ACC $ SU= 2000 SD= 1000 CU= 2000 CD= 1000 F= 1000 3. MAINTENANCE COST/YR = $ 100 4. PRESENT WORTH = $ 88,590 ANNUALIZED $ 10,600 ACCIDENT COST = $ 52,310 ANNUALIZED $ 6,259 HIGHWAY DEPT. COST = $ 36,280 ANNUALIZED $ 4,341 O CHANGE OR ACCESS: INPUT ITEM NUM. OR FUNCTION KEY (SEE BELOW) PLUS ENTER. PRINT STORE RECALL HELP GLOBAL SI v $ DIR SI DEF GRAPH QUIT

  17. Reduction in Accident Costs ROADSIDE 5.0 Condition 1 Acc. Costs 1 Condition 2 Acc. Costs 2 Reduction in Accident Costs

  18. Questions ?

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