AASHTO HSM ERTA-2012 Highway Safety Manual (First Edition).pdf

1、 Kirk T. Steudle, P.E., President Director, Michigan Department of Transportation John Horsley, Executive Director 444 North Capitol Street NW, Suite 249, Washington, DC 20001(202) 624-5800 Fax: (202) 624-5806 www.transportation.orgERRATA for Highway Safety Manual February 2012 Dear Customer: Recent

2、ly, we were made aware of some technical revisions that need to be applied to the Highway Safety Manual, 1st Edition. Please replace the existing text with the corrected text to ensure that your edition is both accurate and current. Users who purchased the CD-ROM do not need to make the revisions no

3、ted in bold. Corrections that were included in the June 2011 errata are in blue ink. AASHTO staff sincerely apologizes for any inconvenience. 2010 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.Errata to Hig

4、hway Safety Manual, 1stEdition HSM-1-E2 1 February 2012 Page Existing Text Corrected Text Volume 1 3-17 The term e(0.4865)is used in Equation 3-4. Change the termto e(0.312). 3-21 Answer to Example 1: “Using Equation 3-7, expected crashes . . .” Change to “Using Equation 3-3 and a calibration factor

5、 = 1.0, expected crashes . . .” 3-21 Answer to Example 2: Using Equation 3.8 . . . Change the answer to “Using Equation 3.7 . . .” 3-33 2nd to last equation on page began with Year 4 (57119)/(0.870.710.641)32 / 3.22 9.94 estimate of crashes for the last year: Change to the following: Year 45 7 11 9

6、0 87 0 71 0 64 132 3 22 9 94 estimate of crashes for the last year: (+ )/(. . . )/. .4-17 The Coefficient of Variation for Segment B1 is shown as 17705357BCV . The denominator should be 5.2: 17705352BCV .4-35 In the table showing Ranking Based on RSI, the Average RSI Cost for Intersection 6 is $48,9

7、00. The Average RSI cost for Intersection 6 should be $42,800. 4-42 The calculation of crash frequency variance shown in the table in Step 3 indicates the variance for Signal is 10.5 and the variance for TWSC is 18.8. The variance for Signal should be 13.75, and the variance for TWSC should be 10.5.

8、 4-46 In Table 4-10, the heading for last column is “Average 3-Year Expected” Change this heading to “Average 3-Year Predicted . . .” 4-46 Eq. 4-16 is incorrect. Replace Eq. 4-16 with the following: 2predictedkN = 4-60 In Eq. 4-26, the last item under “where” is Npredicted,1(FI). Change this item to

9、 Npredicted,n(FI). 7-7 In Section 7.4.3.4, item 1-a-ii is shown as (P/F,i,y) = (1 + i)(y). Change this item to (P/F,i,y) = (1 + i)(y). 7-14 Table 12 is referenced in the last paragraph. Change the reference to Table 7-5. 7-17 In Step 4, Eq. 7-13 is shown as: AM(total)= AM(PDO) AM(FI). Change Eq. 7-1

10、3 to AM(total)= AM(PDO)+ AM(FI). 7-18 Following Eq. 7-14, at the end of second line of the where list, the (P/F,i,y) is calculated as (1 + i) y. Change this calculation to (1 + i)(y). 7-19 In Table 7-10, Columns 2 and 4 need to be revised, as does the heading for Column 2. Substitute Table 7-10 with

11、 the attached revised table. 2010 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.Errata to Highway Safety Manual, 1stEdition HSM-1-E2 2 February 2012 Page Existing Text Corrected Text 7-19 The first line und

12、er Results states, “The estimated present value monetary benefit of installing a roundabout at Intersection 2 is $33,437,850.” Change the amount to $5,675,500. 9-8 Step 2 of Figure 9-2 states, “Calculate the predicted crash frequency for each site summed over the entire before period.” Change “predi

13、cted” to “expected.” 9-21 Eq. A-10 is referenced in the last column in the table under Step 6. Change the reference to Eq. 9A.1-11. 9-41 Eq. 9A.2-16 is shown as Safety Effectiveness = 100 (1 R). Change this equation to Safety Effectiveness = 100 (1 OR). Volume 2 C-14 After Figure C-3, a heading was

14、inadvertently omitted. Add the heading “C.6.3 Safety Performance Functions (SPFs)” immediately following Figure C-3. C-14 The term e(0.4865)is used in Eq. C-4. Change the term to e(0.312). C-15 C.6.3 Crash Modification Factors (CMFs) Renumber the heading as “C.6.4 Crash Modification Factors (CMFs).”

15、 C-18 C.6.4 Calibration of Safety Performance Functions to Local Conditions Renumber the heading as “C.6.5 Calibration of Safety Performance Functions to Local Conditions.” C-18 C.6.5 Weighting Using the Empirical Bayes Method Renumber the heading as “C.6.6 Weighting Using the Empirical Bayes Method

16、.” 10-23 The 3rd row about (CMF3r) in Table 10-7 references Table 10-7. Change this reference to Equation 10-13. 10-23 The 6th row about (CMF6r) in Table 10-7 references Table 10-11. Change this reference to Equation 10-17. 10-25 The calculation 0.98 + 6.875 is used in an equation within the last ro

17、w in Table 10-9. Change the calculation to 0.98 6.875. 10-42 A 1,2000-ft horizontal curve radius is used in the 5th bullet under the heading The Facts. Change the horizontal curve radius to 1,200 ft. 11-10 The second sentence of Step 12 reads, “Otherwise, proceed to Step 14.” Change “Step 14” to “St

18、ep 13.” 11-31 Paragraph 1, line 7 refers to Table 13-9. Change this reference to Table 13-13. 2010 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.Errata to Highway Safety Manual, 1stEdition HSM-1-E2 3 Februa

19、ry 2012 Page Existing Text Corrected Text 11-33 Eq. 11-18 is shown as 10 01610098 016iskewCMFskew.Change the denominator as follows: 10016100 98 0 016iskewCMFskew.11-33 Eq. 11-19 is shown as 10 01710052 017iskewCMFskew.Change the denominator as follows: 10 017100 52 0 017iskewCMFskew.11-34 Eq. 11-20

20、 is shown as 10 05310143 053iskewCMFskew.Change the denominator as follows: 10 053101 43 0 053iskewCMFskew.11-34 Eq. 11-21 is shown as 10 04810072 048iskewCMFskew.Change the denominator as follows: 10 048100 72 0 048iskewCMFskew.11-50 Step 10, Intersection Skew Angle calculates CMFlias follows: 10 0

21、1610098 016iskewCMFskew.10 016 3010 1080 98 0 16 30iCMF.Change this calculation to 10 016100 98 0 016iskewCMFskew.10 016 3010 1330 98 0 016 30iCMF.11-50 The final calculation in Step 10 is CMFcomb= 1.08 0.56 0.90 = 0.54. Change this calculation to CMFcomb= 1.33 0.56 0.90 = 0.67. 11-50 Step 11, Calcu

22、lation of Predicted Average Crash Frequency, indicates the results are = 0.928 1.50 (0.54) = 0.752 crashes/year. Change these results to = 0.928 1.50 (0.67) = 0.933 crashes/year. 11-52 Column 2 of the table for Worksheet SP3B lists CMF for Intersection Skew Angle for the Total Crash Severity Level i

23、n Row 1 as 1.08 and the Fatal and Injury Crash Severity Level in Row 2 as 1.09. Change the CMF for Intersection Skew Angle for the Total Crash Severity Level to 1.33 and the Fatal and Injury Crash Severity Level to 1.50. 11-52 Column 6 of the table for Worksheet SP3B lists Combined CMF for the Total

24、 Crash Severity Level in Row 1 as 0.54 and the Fatal and Injury Crash Severity Level in Row 2 as 0.44. Change the Combined CMF in Column 6 to 0.67 for the Total Crash Severity Level in Row 1 and to 0.61 for the Fatal and Injury Crash Severity Level in Row 2. 11-52 Column 5 of the Worksheet SP3C show

25、 the values for Combined CMFs are 0.54 for Total Crash Severity Level in Row 1, 0.44 for Fatal and Injury Crash Severity Level in Row 2, and 0.44 for Fatal and Injury Crash Severity Level in Row 3. Change these values to 0.67, 0.61, and 0.61, respectively. 2010 by the American Association of State H

26、ighway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.Errata to Highway Safety Manual, 1stEdition HSM-1-E2 4 February 2012 Page Existing Text Corrected Text 11-52 Column 7 of the Worksheet SP3C show the values for Predicted Crash Frequency are 0.752 fo

27、r Total Crash Severity Level in Row 1, 0.286 for Fatal and Injury Crash Severity Level in Row 2, 0.178 for Fatal and Injury Crash Severity Level in Row 3, and 0.466 for Property Damage Only in Row 4. Change these values to 0.933, 0.396, 0.247, and 0.537, respectively. 11-53 The values in Columns 3,

28、5, 7, and 9 in the table for Worksheet SP3D are incorrect. Substitute the table for Worksheet SP3D with the attached revised table. 11-53 In the table for Worksheet SP3E, the values for Predicted Average Crash Frequency listed in Column 2 are 0.752, 0.286, 0.178, 0.466 crashes/year. Change these val

29、ues to 0.933, 0.396, 0.247, and 0.537, respectively. 11-55 The values in Columns 2, 3, 4, 7, and 8 for Intersections shown in Worksheet SP4A are incorrect. Substitute the table for Worksheet SP4A with the attached revised table. 11-55 The final calculation for Intersection 1 is shown as 10 7431 0 46

30、0 0 752w.(.). Change this calculation to 10 7001 0 460 0 933w.(.). 11-56 Under the subheading Column 8Expected Average Crash Frequency, the calculation for Intersection 1 is shown as follows: Nexpected= 0.743 0.752 + (1 0.743) 3 = 1.330. Change this calculation to Nexpected= 0.700 0.933 + (1 0.700)

31、3 = 1.554. 11-56 The values and the reference to Worksheet 3A in the table for Worksheet SP4B are incorrect. Substitute the table for Worksheet SP4B with the attached revised table. 11-58 The headings and values shown in the tables for Worksheet SP5A and SP5A Continued are incorrect. Substitute the

32、tables for Worksheet SP5A and SP5A Continued with the attached revised table. 11-59 The calculation for w0in Column 9 is shown as 11 96814 3470 688.Change the calculation to 12 10914 5280 682.11-59 The calculation for N0in Column 10 is shown as = 0.688 4.347 + (1 0.688) 9 = 5.799. Change the calcula

33、tion to 0.682 4.528 + (1 0.682) 9 = 5.950. 2010 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.Errata to Highway Safety Manual, 1stEdition HSM-1-E2 5 February 2012 Page Existing Text Corrected Text 11-59 The

34、 calculation for w1in Column 11 is shown as 12 00914 3470 684.Change this calculation to 12 07614 5280 686.11-59 The calculation for N1in Column 12 is shown as = 0.684 4.347 + (1 0.684) 9 = 5.817. Change this calculation to = 0.686 4.528 + (1 0.686) 9 = 5.932. 11-59 The calculation for Nexpected/com

35、bin Column 13 is shown as 5 799 5 81725 808.Change this calculation to 5 950 5 93225 941.11-60 The values shown in the table for Worksheet SP5B are incorrect. Substitute the table for Worksheet SP5B with the attached revised table. 11-61 The first sentence in the section on Results reads, “The predi

36、cted average crash frequency for the proposed four-lane facility project is 4.4 crashes per year, and the predicted crash reduction for the project is 8.1 crashes per year.” Change the numbers to 4.5 crashes per year for the predicted average crash frequency and 7.8 crashes per year for the predicte

37、d crash reduction. 11-61 The values in Table 11-26 are incorrect. Substitute Table 11-26 with the attached revised table. 12-12 The second sentence of Step 12 reads, “Otherwise, proceed to Step 14.” Change “Step 14” to “Step 13.” 12-43 Paragraph 1, line 2 of Section 12.7.2 refers to CMF4i. Change CM

38、F4ito CMF6i. 12-86 Paragraph 1, Line 1 of the section on Results refers to “the unsignalized intersection in Sample Problem 4.” Change “unsignalized” to “signalized.” 12-114 Column head (7) of Worksheet 2C Continued refers to Worksheet SP4B. Change the reference to Worksheet 2B. 12-115 Column head (

39、7) of Worksheet 2E Continued refers to Worksheet SP4B. Change the reference to Worksheet 2B. A-5 In Table A-2, the row for Presence of Lighting for Chapter 11 shows the “X” in the Required column. The “X” should be in the Desirable column. A-5 In Table A-2, the row for Sideslope for Chapter 11 shows

40、 the “X” not aligned in the Required column. The “X” should be in the Required column. 2010 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.Errata to Highway Safety Manual, 1stEdition HSM-1-E2 6 February 2012

41、 Page Existing Text Corrected Text A-6 In Table A-2, the row for Presence of Lighting for Chapter 11 reads “Need actual datad.” The final d should be deleted so that the text reads “Need actual data.” A-6 In Table A-2, the row for Intersection Skew Angle for Chapter 11 does not have a superscript. I

42、nsert a superscript “d” to indicate a cross reference to table note d. The text should read, “Assume no skewd ”. A-7 In Table A-2, Pedestrian Volume for Chapter 12 refers to “Estimate with Table 12-21.” Change the cross reference to Table 12-15. A-8 The first line of Example Calibration Factor Calcu

43、lation refers to Equation 10-18. Change the cross reference to Equation 10-10. A-8 In the calculation for predicted crash frequency, the sample indicates that Nbibase= e(5.73 + 0.60 ln(4000) + 0.20 ln(2000)= 2.152 crashes/year The correct values should be Nbibase= e(5.13 + 0.60 ln(4000) + 0.20 ln(20

44、00)= 3.922 crashes/year A-8 In the paragraph following the Nbibasecalculation, the first sentence states, “The intersection has a left-turn lane on the major road, for which CMF1iis 0.67, and a right-turn lane on one approach, a feature for which CMF2iis 0.98.” Change this text to read, “The interse

45、ction has a left-turn lane on the major road, for which CMF1iis 0.82, and a right-turn lane on one approach, a feature for which CMF2iis 0.96.” A-8 The calculation for predicted average crash frequency is recorded as “2.152 0.67 0.98 3 = 4.240 crashes in three years, shown in Column 9.” The correct

46、values for this calculation are actually “3.922 0.82 0.96 3 = 9.262 crashes in three years, shown in Column 9.” A-8 The final paragraph on page A-8 indicates, “. . . The sum of the observed crash frequencies in Column 10 (43) is divided by the sum of the predicted average crash frequencies in Column

47、 9 (45.594) to obtain the calibration factor, Ci, equal to 0.943. It is recommended that calibrations factors be rounded to two decimal places, so calibration factor equal to 0.94 should be used . . .” These sentences of the paragraph should read, “. . .The sum of the observed crash frequencies in C

48、olumn 10 (43) is divided by the sum of the predicted average crash frequencies in Column 9 (87.928) to obtain the calibration factor, Ci, equal to 0.489. It is recommended that calibrations factors be rounded to two decimal places, so calibration factor equal to 0.49 should be used . . .” A-9 The va

49、lues in Columns 3, 5, 7, and 9 of Table Ex-1 are incorrect. Substitute the table for Table Ex-1 with the attached revised table. Volume 3 D-3 A sentence for Row “T” in Table D-1 was omitted. Add “A list of these treatments is presented in the appendices to each chapter” as the final sentence in this row. D-5 Item 2 in