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SPEED LIMIT WORKSHOP

SPEED LIMIT WORKSHOP. PRESENTED BY CALTRANS AND CALIFORNIA HIGHWAY PATROL. WORKSHOP PRESENTERS. ROBERTA McLAUGHLIN,PE,TE,PTOE CALTRANS DIVISION OF TRAFFIC OPERATIONS OFFICE OF SIGNS AND MARKINGS SERGEANT KEVIN DAVIS CALIFORNIA HIGHWAY PATROL PLANNING AND ANALYSIS DIVISION.

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SPEED LIMIT WORKSHOP

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  1. SPEED LIMIT WORKSHOP PRESENTED BY CALTRANS AND CALIFORNIA HIGHWAY PATROL

  2. WORKSHOP PRESENTERS • ROBERTA McLAUGHLIN,PE,TE,PTOE • CALTRANS • DIVISION OF TRAFFIC OPERATIONS • OFFICE OF SIGNS AND MARKINGS • SERGEANT KEVIN DAVIS • CALIFORNIA HIGHWAY PATROL • PLANNING AND ANALYSIS DIVISION

  3. WORKSHOP PROTOCOL • PUT PHONES ON SILENT MODE • STAY FOCUSED • PROVIDE INPUT, BUT AVOID LONG PERSONAL EXPERIENCES • USE INDEX CARDS FOR QUESTIONS TO ADDRESS AT END OF SESSION • LOCATION OF RESTROOMS • NO FOOD OR DRINK IN AUDITORIUM

  4. AUDIENCE (BY SHOW OF HANDS) • CALTRANS HQ’S • CALTRANS DISTRICT • PUBLIC AGENCY TRAFFIC DEPARTMENT • PUBLIC AGENCY (NOT TRAFFIC) . . . THERE’S MORE ON NEXT SLIDE

  5. AUDIENCE (CONT’D) • LAW ENFORCEMENT • COURT OFFICIALS • ENGINEERING CONSULTANTS • ATTORNEYS • ANYONE NOT LISTED ABOVE

  6. GREETINGS FROM CALTRANS HQ & HOST DISTRICT • ROBERT COPP, HQ • DIVISION CHIEF, TRAFFIC OPERATIONS DIVISION • CHARLES GRAY • SR TRANS ENGR, DISTRICT 11 OFFICE OF TRAFFIC OPERATIONS

  7. PURPOSE OF WORKSHOP • WHY • HOW • WHO • WHEN • WHERE

  8. TODAY’S TOPICS • SPEED LIMIT HISTORY • JULY 1, 2009 CHANGES • CALIFORNIA TRAFFIC CONTROL DEVICES COMMITTEE (CTCDC) • CALIFORNIA VEHICLE CODE (CVC) • CALIFORNIA MANUAL ON UNIFORM TRAFFIC CONTROL DEVICES (CA MUTCD)

  9. TODAY’S TOPICS (CONT’D) • ENGINEERING AND TRAFFIC SURVEYS (E&TS) • SPEED ENFORCEMENT • COURT’S REVIEW OF SPEEDING CITATIONS • INFORMATION SHARING • ANSWER YOUR QUESTIONS • RESOURCES FOR FUTURE REFERENCE

  10. NOT ON TODAY’S AGENDA • DEBATING WHAT HAS ALREADY BEEN DISCUSSED WITH CTCDC • SIGN DETAILS AND LOCATIONS • ROADWAY CHANGES TO SLOW DOWN VEHICLES

  11. BRIEF HISTORY OF SPEED LIMITS IN CALIFORNIA • EARLY DAYS OF SETTING SPEED LIMITS • WHY 85TH PERCENTILE? • CALTRANS TRAFFIC MANUAL • FEDERAL HIGHWAYS MUTCD • CALIFORNIA MUTCD • CTCDC

  12. EARLY DAYS OFSETTING SPEED LIMITS • 1901, CONNECTICUT • 8 MPH IN CITIES • 1926, UNIFORM VEHICLE CODE • FIRST PUBLISHED REQUIRED MOTORISTS TO DRIVE AT SPEEDS “REASONABLE AND PRUDENT” • 1941 COMMITTEE ON SPEED REGULATION • RECOMMENDED 80 TO 90TH PERCENTILE

  13. WHY 85TH PERCENTILE? • ANALYTICAL SUPPORT FROM THESE STUDIES: • 1964 SOLOMON • 1968 CIRILLO • RTI 1970 • REPRESENTS UPPER BOUND OF THE PREFERRED DRIVING SPEED • CORRESPONDS TO UPPER BOUND OF SPEED RANGES WHERE CRASH RATES ARE LOWEST

  14. DATA ANALYSIS • • • > 1 SD from Mean

  15. CALTRANS TRAFFIC MANUAL • SUPERCEDED IN MAY 2004 WITH MUTCD AND CALIFORNIA SUPPLEMENT http://www.dot.ca.gov/hq/traffops/signtech/signdel/trafficmanual.htm

  16. FEDERAL MANUAL ON UNIFORM TRAFFIC CONTROL DEVICES The 2003 Edition of the MUTCD with Revisions Number 1 and 2 Incorporated, dated December 2007, is available in both PDF and HTML. http://mutcd.fhwa.dot.gov/kno_2003r1r2.htm

  17. CALIFORNIAMANUAL ON UNIFORM TRAFFIC CONTROL DEVICES • CA MUTCD http://www.dot.ca.gov/hq/traffops/signtech/mutcdsupp/index.htm

  18. CALIFORNIA TRAFFIC CONTROL DEVICES COMMITTEE • CTCDC “This committee is the vehicle by which the Department fulfills its obligation to consult with local agencies and the public, before adopting rules and regulations prescribing uniform standards and specifications for all official traffic control devices used in California.” http://www.dot.ca.gov/hq/traffops/signtech/newtech/

  19. MAKING CHANGES TO THE CA MUTCD • FEDERAL CHANGES • LEGISLATIVE CHANGES • CHANGES IN CVC • REQUESTS FROM OTHERS

  20. MAKING CHANGES TO THE CA MUTCD • STAFF PREPARES PROPOSED CHANGES TO TEXT AND AGENDA ITEM FOR CTCDC • CTCDC HOLDS PUBLIC MEETING • SCHEDULED THREE TIMES A YEAR • CALTRANS CONCURRENCE • TRAFFIC OPERATIONS POLICY DIRECTIVE (TOPD)

  21. WHY DID SECTION 2B.13 NEED CHANGING?

  22. SPEED LIMIT CONCERNS • PROPOSED SB 848 (2007) CORBETT • CHANGES TO E&TS PROCESS • ROUND DOWN BELOW 85TH PERCENTILE • ELIMINATE E&TS FOR “SPEED TRAP” • SPEED LIMITS CREEPING UPWARD • APPLYING 5 MPH REDUCTION • POLITICAL PRESSURE TO LOWER SPEED LIMITS

  23. BACKGROUND INFORMATION • 1996 TRAFFIC MANUAL The speed limit normally should be established at the first five mile per hour (mph) increment below the 85th percentile speed. However, in matching existing conditions with the traffic safety needs of the community, engineering judgment may indicate the need for a further reduction of five mph.

  24. MUTCD 2003 Guidance: When a speed limit is to be posted, it should be within 10 km/h or 5 mph of the 85th percentile speed of free-flowing traffic.

  25. 2004 CALIFORNIA SUPPLEMENT Guidance: When a speed limit is to be posted, it should be established at the nearest 10 km/h or 5 mph increment of the 85th percentile speed of free-flowing traffic.

  26. 2004 CALIFORNIA SUPPLEMENT The posted speed may be reduced by 10 km/h (5 mph) from the nearest 10 km/h or 5 mph increment of the 85th percentile speed, where engineering study indicates the need for a reduction in speed to match existing conditions with the traffic safety needs of the community.

  27. CHANGES TO 2006 CA MUTCD (TOPD 09-04) The speed limit shall be established at the nearest 5mph increment of the 85th percentile. If the 5 mph reduction is applied, the E&TS shall document in writing the conditions and justification for the reduced speed limit and be approved by a registered Civil or Traffic Engineer.

  28. SUMMARY OF DISCUSSION OVER LAST TWO YEARS • SEVERAL MEETINGS WITH CTCDC • LOTS OF LETTERS AND E-MAILS • SUBCOMMITTEE MEETINGS • WITHIN 5 MPH vs NEAREST 5MPH • APPLYING 5 MPH REDUCTION • DOCUMENTATION OF JUSTIFICATION • 50TH PERCENTILE • “HARD FLOOR” vs “SOFT FLOOR”

  29. SUMMARY OF DISCUSSION (CONT’D) • 3/19/09 -- SPECIAL HEARING WITH DIRECTOR KEMPTON AND COMMISSIONER FARROW • 5/15/09 -- DIRECTOR KEMPTON ISSUES DECISION • 7/1/09 -- TOPD 09-04 ISSUED

  30. TRAFFIC OPERATIONS POLICY DIRECTIVE 09-04 • FIND IT AT THIS WEBSITE http://www.dot.ca.gov/hq/traffops/signtech/ • CHANGES TO CA MUTCD • “should be within” 5 mph to “shall be to the nearest” 5 mph • 5 mph reduction approved by CE or TE • Document reasons for 5 mph reduction

  31. QUESTIONS? • ABOUT THE MATERIAL SO FAR • ABOUT THE PROCESS FOR CHANGING CA MUTCD • WHERE TO GO FOR MORE INFO

  32. CALIFORNIA VEHICLE CODES FOR SPEED LIMITS • SECTION 627 “ENGINEERING AND TRAFFIC SURVEY” • SECTIONS 22348-22366 GENERAL SPEED LAWS • SECTIONS 40801 to 40805 OTHER SPEED LAWS • SECTION 40802 “SPEED TRAP”

  33. CVC and CA MUTCDCOMPARISION • CVC • NEED FOR E&TS • DELEGATES E&TS PROCEDURES TO THE DEPARTMENT OF TRANSPORTATION • SPEED LIMITS SET BY LEGISLATION • USED FOR CITATIONS

  34. CVC 627 “ENGINEERING AND TRAFFIC SURVEY” 1.PREVAILING SPEEDS* 2. ACCIDENT RECORDS 3.HIGHWAY, TRAFFIC AND ROADSIDE CONDITIONS NOT READILY APPARENT TO THE DRIVER *NO SPECIFIC MENTION OF 85TH %TILE

  35. CVC 22358.5 “…PHYSICAL CONDITIONS SUCH AS WIDTH, CURVATURE, GRADE AND SURFACE CONDITIONS OR ANY OTHER CONDITION READILY APPARENT TO THE DRIVER, WOULD NOT REQUIRE SPECIAL DOWNWARD SPEED ZONING.”

  36. CVC and CA MUTCDCOMPARISION • CA MUTCD • CRITERIA FOR SELECTING VALUE OF SPEED LIMIT • E&TS ELEMENTS • SAMPLE FORMS • REPORT FORMAT • SIGNS TO USE • NATIONAL STANDARDS • CALIFORNIA MODIFICATIONS

  37. 85TH PERCENTILE SPEED • FOUNDATION FOR SETTING APPROPRIATE SPEED LIMITS • EXCEPTED PRACTICE FOR MANY YEARS • BASED ON STATISTICAL ANALYSIS

  38. DATA ANALYSIS • • • > 1 SD from Mean

  39. 10 MPH PACE

  40. EXERCISE • LET’S LOOK AT HANDOUT OF 2006 CA MUTCD: PAGES 2B-7,8,9 & 10 E&TS PROCEDURES PAGES 2B-86,87,88,89 SAMPLE CHARTS

  41. TIME FOR A BREAK

  42. ENGINEERING AND TRAFFIC SURVEY PROCEDURES • RENEWAL TIME PERIODS • COLLECTING DATA • WRITING REPORT • DISTRIBUTION OF REPORT

  43. E&TS RENEWAL PERIOD • 5 YEARS • 7 YEARS • 10 YEARS

  44. COLLECTING DATA • RADAR EQUIPMENT • LOCATION • CONDITIONS • SIZE OF SAMPLE

  45. WRITING REPORT • FORMAT • GRAPHICS • SIGNATURES

  46. DISTRIBUTION OF E&TS • ENGINEER’S OFFICE FILE • LOCAL COURT SYSTEM • LAW ENFORCEMENT AGENCY

  47. ENGINEERING AND TRAFFIC SURVEY • SIGNED AND APPROVED BY REGISTERED ENGINEER (CIVIL OR TRAFFIC) • DOCUMENT REASONS FOR USING 5 MPH REDUCTION

  48. REVIEW DATA FOR ONE YEAR • EXISTING POSTED SPEED LIMIT • 85TH PERCENTILE SPEED • 50TH PERCENTILE SPEED • NEW SPEED LIMIT • ACCIDENT HISTORY BEFORE AND AFTER

  49. SPEED LIMIT ENFORCEMENT

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