1 / 11

Los Angeles County Metropolitan Transportation Authority

Los Angeles County Metropolitan Transportation Authority. Simulating I-710 Corridor Presented in the Western ITE Annual Meeting Santa Barbara, California Jun 26, 2012 Author: SM Alam, PE, TE (URS) Co-Authors: Douglas E. Smith, PE, PTOE (URS)

adah
Download Presentation

Los Angeles County Metropolitan Transportation Authority

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Los Angeles County Metropolitan Transportation Authority Simulating I-710 Corridor Presented in the Western ITE Annual Meeting Santa Barbara, California Jun 26, 2012 Author: SM Alam, PE, TE (URS) Co-Authors: Douglas E. Smith, PE, PTOE (URS) Ernesto Chaves (Proj. Manager, Metro Hwy Prog.)

  2. Project Location

  3. Alternative 6A (North-End) Simulation PM Peak Hour (I-710 between Slauson Ave and SR-60)

  4. Alternative 6A Alternative 6A(Widen to 10 General Purpose Lanes, Plus 4 Freight Movement Lanes [Conventional Trucks]) Alt. 6A • Includes Alternative 1, Alternative 2, Alternative 4, and Alternative 5A. • Consistent with the Major Corridor Study Locally Preferred Strategy. • Assumes conventional diesel powered trucks will use the freight corridor. • Can reevaluate and adjust the number of lanes based upon refined traffic forecasting. Freight Corridor4 Lanes Widen I-710 to10 GP Lanes Arterials / I-710Congestion Relief Enhanced GoodsMovement by Rail No Build TSM/TDM,ITS, Transit

  5. Calibration • Existing model calibration: • Existing model calibrated to match observed traffic flow and queues • In coordination with Caltrans • Consulted other simulation models prepared in this area during the calibration process • Alternative 6A Parameter Adjustments: • 2035 Alternative 6A Model utilizes the adjusted existing calibration parameters as a starting point • Parameters were then iteratively adjusted to reflect the enhanced geometrics for the PM Peak Hour • Typical Parameters: • Car following parameters (headway time) • Lane change behaviours (acceleration & deceleration rates) • Speed distribution • Signal timing

  6. Alternative 6A Simulation: I-710 Northbound • Bottlenecks occur along the mainline due to northern terminus of the Freight Corridor on-ramp south of the I-5 interchange • High volume on-ramp from Atlantic Avenue/Bandini Boulevard on-ramp • Queue spillback occurs due to mainline lane drops at the I-5/I-710 interchange • VISSIM volume is calibrated within the acceptable range (10%) to the model volume • VISSIM speed is generally lower than the HCM calculated speed due to over-saturated conditions and queue spillback

  7. Alternative 6A Simulation: I-710 Southbound • This simulation does not include the ultimate I-5/I-710 geometry and retains the left-hand exit from I-710 to I-5 • Bottlenecks begin to form at Florence Ave. due to the mainline lane drop • Friction of vehicles between I-5 on-ramp, the Atlantic Ave./Bandini Blvd. off-ramp, and the Freight Corridor off-ramp • VISSIM volume is calibrated within the acceptable range (10%) to the model volume • VISSIM speed is generally lower than the HCM calculated speed due to over-saturated conditions and queue spillback

  8. Flow: VISSIM vsHCM (I-710 Northbound Alt 6A PM)

  9. Flow: VISSIM vsHCM (I-710 Southbound Alt 6A PM)

  10. VISSIM vsHCM Results: I-710 Mainline

  11. Questions / Discussion

More Related