1 / 20

Rail-Truck Diversion Approach

Rail-Truck Diversion Approach. Transportation leadership you can trust. I-40/I-81 Corridor Feasibility Study. presented to 12th TRB National Planning Applications Conference Houston, Texas presented by Dan Beagan Cambridge Systematics, Inc. May 18, 2009. I-40/I-81 Corridor Feasibility Study.

gari
Download Presentation

Rail-Truck Diversion Approach

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. Rail-Truck Diversion Approach Transportation leadership you can trust. I-40/I-81 Corridor Feasibility Study presented to12th TRB National Planning Applications ConferenceHouston, Texas presented byDan BeaganCambridge Systematics, Inc. May 18, 2009

  2. I-40/I-81 Corridor Feasibility Study • Identify and address I-40/I-81 deficiencies • Consider effectiveness of truck/rail diversion • Consider multimodal solutions • HOV/HOT/truck only lanes • Increased use of rail • Public transit

  3. Study Corridor • Bristol to Memphis, 550 Miles • Includes 9 of the State’s 12 RPOs • Crosses 8 of the State’s 11 MPOs

  4. Trans-Tennessee CorridorProject Description • Build out rail network between Nashville and Knoxville Source: “An Evaluation of the Tennessee Rail Plan’s Treatment of a Trans-Tennessee Rail Routing” by Center for Business and Economic Research University of Tennessee

  5. Rationale for Constructing the Rail Link • Practical impact of east-west network connectivity • Alternate route for through rail traffic • Supplement for NS’s current Knoxville-Memphis line • Easy rail access for Nashville goods to the Mid-Atlantic and Northeast markets • CSX currently runs north-south through Nashville • Avoid circuitous Atlanta and Cincinnati routes • No NS service to Nashville • Easy rail access for Knoxville goods to the Northwest

  6. Nashville and Knoxville Access • Freight flows from Nashville to Mid-Atlantic and Northeast • Need to estimate divertible truck tons in 2030 • Freight flows from Knoxville to the Northwest • Need to estimate divertible truck tons in 2030 • Truck-rail diversion model will determine if these divertible tons are significant on I-40/I-81 highway flows

  7. Truck-Rail Diversion Methodology • TDOT Freight Rail Model • Developed as part of the TDOT Freight Model • TRANSEARCH 2001 rail flows assigned to TransCAD rail network using length as impedance • Pros • Ability to estimate diversion based on improvements proposed as part of I-40/I-81 study • Data consistency with previous TDOT freight rail analyses • Cons • No capacity maximums on rail network • Capacity changes will need to be reality checked with railroads

  8. Truck-Rail Diversion MethodologyOverview • Run existing rail model under future year scenario • Update future year scenario and re-run model • Determine the change in distance between all origin-destination pairs in the existing and the updated rail models • Estimate the change in cost associated with the change in distance • Use cross-elasticities to estimate level of diversion from truck to rail

  9. Truck-Rail Diversion Trans-Tennessee Corridor • Add a rail link between Cookeville and Crossville to the rail network • Use the FRA shapefile as a guide for link shape, length, and placement

  10. Truck-Rail Diversion Estimate New Distances • Calculate lengths for new links in the updated rail network • Re-run the rail model with the updated rail network • Re-calculate the distances beween allorigin-destination pairs with this new network

  11. Trans-Tennessee CorridorNetwork Connectivity for Through Rail Traffic Knoxville 469 Memphis 446 • Proposed east-west connection distance = 469 miles • Current Knoxville-Memphis rail line distance = 446 miles

  12. Truck-Rail Diversion ExampleTrans-Tennessee CorridorEstimate Cost Savings • Estimate the rail cost associated for each origin-destination pair with and without the new rail link • For carload rail, cost/ton = $14.55 + $0.025 * miles • For intermodal rail, cost/ton = $20.84 + $0.028 * miles • Calculate the percentage change in costs • For each origin-destination pair without the new rail link • For each origin-destination pair with the new rail link

  13. Truck-Rail Diversion Estimate Cost Savings • Rail costs decrease for goods shipped by rail from Nashville to the Mid-Atlantic and Northeast

  14. Truck-Rail Diversion Estimate Cost Savings • Rail costs decrease for goods shipped by rail from Knoxville to some states to the West

  15. Truck-Rail Diversion Estimate Cost Savings • Rail costs decrease for goods shipped from North Carolina to some states in the West and counties in NW Tennessee

  16. Truck-Rail Diversion Estimate Diversion • Use “cross-elasticities” to convert from change in rail costs to percent diversion from truck to rail in terms of tonnages Source: “Estimates of Mode Choice Probabilities and Market Elasticities of Demand” by Walid M. Adelwahab.

  17. Truck-Rail Diversion Estimate Diversion to Rail • Calculate diversion of tonnages • Assign tonnages to rail network

  18. Truck-Rail Diversion Estimate Diversion from Truck/Highway • Convert annual tonnages diverted to daily truck trips • Remove diverted trucks from the truck trip table in the SWM TransCAD truck model • Assign new truck trip table to the highway network to determine the magnitude of the diversion for each highway link

  19. Truck Rail DiversionDiversion from Truck/Highway • 500 trucks per day diverted from I-40 to the new rail connection • Diversion primarily limited to • Exchanges through northwest Tennessee to the Pacific Northwest • Exchanges to and from the Carolinas • The expected diversion of trucks traveling between Knoxville and Memphis did not materialize • Rail distance on the existing Norfolk Southern line,via Huntsville, Alabama is 446 miles • Rail distance for the proposed route on the CSX tracks,via Nashville is 469 miles

  20. Rail-Focused Package • New intermodal yards (East Tennessee, relocation of Nashville yard to outside of urban area) • Rail line on new I-40 bridge over Mississippi River bridge in Memphis • Enhanced rail connectivity • NS Crescent Corridor • Does not include “Missing Link” Nashville to Knoxville • B/C for I-40 is 0.1

More Related