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PURPOSE. To minimize traffic delays caused by planned lane closures. To maximize safety inside and outside the work zone. To create a level playing field for all Contractors bidding on our projects.. FACTS. Charts are developed using the latest available traffic volumes.The basic theory in developing the charts is based on actual field operation experience.Each project is analyzed to balance the needs between the Contractor and the motoring public..
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1. LANE CLOSURE CHARTS DEVELOPMENT AND DELAY PENALTY OBJECTIVE To become familiar with the lane closure chart development process and delay calculation.
2. PURPOSE To minimize traffic delays caused by planned lane closures.
To maximize safety inside and outside the work zone.
To create a level playing field for all Contractors bidding on our projects.
3. FACTS Charts are developed using the latest available traffic volumes.
The basic theory in developing the charts is based on actual field operation experience.
Each project is analyzed to balance the needs between the Contractor and the motoring public.
4. FACTS (CONT.) We perform field observations and consult with field personnel to determine the length of time required for specific construction or maintenance operations.
We always try to accommodate your request within our limited boundary.
5. FREEWAY CAPACITY Typically one lane can handle between 1800 - 2000 vph.
Capacity is affected by geometric alignments, lane width, truck volume, weather, # of lanes open for traffic to use and “GAWKING “ (type of operation ).
7. Chart is based on “0” delay for construction and permit projects, and 5 -15 minutes Delay for MTCE work.
When demand is less than capacity, the freeway lane is permitted to be closed.
We use an average capacity of 1500 vph per lane for construction and permit projects.
Lane closure charts are based on traffic demand, therefore, we specify number of lanes that are required to OPEN for public to use, not the number of lanes that can be closed.
8. LANE CLOSURE CHART For a typical 5 lane freeway :
Demand < 1500, 1 lane is required to be open.
1500 <Demand< 3000, 2 lanes are required.
3000 <Demand< 4500, 3 lanes are required.
4500 <Demand< 6000, 4 lanes are required.
Lane Closure hours for the “Working day before designated legal holiday” is the same as a Friday, except no work will be permitted after the morning closure.
“No lane closure permitted”; no work permitted on any designated legal holidays.
10. LANE CLOSURE CHART EXERCISE
14. LANE CLOSURE CHART EXERCISE Develop a lane closure chart based on the traffic demand for 7-12 and 7-13 and 7-14
Use 1500 vph per lane.
15 minutes to complete this exercise.
15. ANSWER
17. Information to Provide When Requesting a Lane Closure Chart and Maintaining Traffic Specifications Complete set of plans.
Detailed description of proposed work (ALL).
Identify any work that may require a full freeway closure.
18. The DTM’s Role with the Lane Closure Chart
19. DISTRICT TRAFFIC MANAGER
21. Delay PenaltyA+B BiddingLake Tahoe Basin
22. DELAY PENALTY Standard Special Provision (SSP) 12-220 was introduced in late 1998 and fully adopted by District 3 in mid-1999.
Contractor is required submitted his/her lane closure request ONE week in advance for Caltrans approval.
All planned lane closures are posted on the internet, the address is:
http://onramp.dot.ca.gov/dist03/index.html
23. DELAY PENALTY (CONTINUED) Contractor is required to provide a “Contingency Plan” at the request of the Resident Engineer.
Para. # 13 provides a “hammer” for the RE to charge the Contractor ($$$) for late pick-up of the closure .
Delay penalty concept for late opening is agreed to by CALTRANS and the Association of General Contractors. Estimated traffic delay must equal or exceed $6000 per hour for the first two hours beyond the time when all lanes are opened to traffic as specified on the lane closure chart.
24. DELAY PENALTY (CONTINUED) Deputy District Director of Construction’s concurrence is required with the delay penalty before we can include as part of the SSP in most Districts. In District 3 the TMP Manager has this authority.
If more than one chart/delay penalty, worst case applies.
Delay cost for each truck is based on $0.40 per minute and $0.15 for each car.
SSP 12-220 applies to ALL projects requiring lane closures.