automated traffic and engineering surveys mike keller district 05 san luis obispo, california mike...
TRANSCRIPT
Automated Traffic and Engineering Surveys
Mike Keller
District 05
San Luis Obispo, California
Mike Keller
District 05
San Luis Obispo, California
Purpose of a Survey
•To establish justifiable speed limits
•Enable Law Enforcement and the Court to site and convict flagrant offenders according to the California vehicle Code
Data Collection
• Speed Samples
Data Collection
• Speed Samples
•Laser vs. Microwave
Data Collection
• Speed Samples
• Laser vs. Microwave
• Old Calculation Method
Data Collection
• Speed Samples
• Laser vs. Microwave
• Old Calculation Method
• New Calculation Method
LASER SURVEY<SPEED CHECK AT CITY PARK><CLEAR AFTERNOON>
POSTED SPEED LIMIT: <35>
TIME FROM:<97/11/05 17:51> TO:<97/11/05 17:52> FILENAME: DEMO.A51TRAFFIC DIRECTION:<2-DIM.> MIN SPD ALLOWED <11> MAX SPD ALLOWED <100>
SPD #VEH. %ILE ABOVE THIS SPEED 16 - 17 0 100.00 17 - 18 2 98.00 18 - 19 4 94.00 19 - 20 0 94.00 20 - 21 4 90.00 21 - 22 2 88.00 22 - 23 2 86.00 23 - 24 0 86.00 24 - 25 3 83.00 25 - 26 0 83.00 38 - 39 0 23.00 39 - 40 4 19.00 40 - 41 5 14.00 41 - 42 2 12.00 42 - 43 4 8.00 43 - 44 3 5.00 44 - 45 2 3.00 45 - 46 0 3.00 46 - 47 2 1.00 47 - 48 1 0.00 48 - 49 0 0.00
TOTAL VEHICLES = 100 MINIMUM SPEED = 17 MAXIMUM SPEED = 47
AVERAGE SPEED = 31.13 50th PERCENTILE = 29.82 85th PERCENTILE = 40.60
TEN MILE PACE = 24 - 33 #VEHICLES IN PACE = 53 %VEHICLES IN PACE = 53.00
STANDARD DEVIATION = 9.38 %OVER LEGAL LIMIT = 31.00 END OF REPORT
Additional Benefit Of Software
• LINE GRAPH
• BAR CHART
LINE GRAPH
BAR CHART
TIME SAVING RECAP
Data Collection Time Savings
A ( 3 ) Mile Segment x ( 3 ) collection spots per Mile, = 9 locations.
Microwave Radar Laser Gun
9 locations x ( 2 ) location moves =18 x .5Hr = 9 Hrs 9 locations x .5 Hr = 4.5
9 HR’S X $40.00 = $360.00 4.5 HR’S X $40.00 = $180.00
Calculation Savings
Microwave Radar Laser Gun
9 locations x ( 2 ) sheets = 18 sheets Plug laptop into printer and print 9locations in .5 Hr.
18 sheets x .25 Hr = 4.5 Hr’s
4.5 x $40.00 = $180.00 .5 x $40.00 = $20.00
Total Cost Total Cost$360.00 $180.00$180.00 $ 20.00$540.00 $200.00
Strip Maps• Existing Construction
Strip Maps• Existing Construction• New Construction
Hand Delineated Strip Map
Aerial Photo Strip Map
Strip Maps• Existing Construction
• New Construction
Hand Delineated Strip Map
Aerial
•Storage & Shipping
Benefit & Cost Savings of Streamlining
Time & Labor• Collecting data• Calculating data• Eliminate vendors & middleman
Materials• Kronaflex Sheets• Blueline Sheets• Photo Negatives• Storage
Automated Traffic and Engineering Surveys
Mike Keller
Caltrans
District 05
50 Higuera Street
San Luis Obispo, California 93401
(805) 549-3125
The Powerpoint presentation may be viewed on the Caltrans District 05 website.
Www.dot.ca.gov/dist05
Mike Keller
Caltrans
District 05
50 Higuera Street
San Luis Obispo, California 93401
(805) 549-3125
The Powerpoint presentation may be viewed on the Caltrans District 05 website.
Www.dot.ca.gov/dist05