Transcript New Methods in Bidding

DETERMINATION OF
FREIGHT CORRIDORS
FOR THE STATE OF
CALIFORNIA
ADHARA CASTELBLANCO
Texas A&M University
Civil Engineering Department
CVEN 689-600
April 28, 2003
Outline
Introduction
Objective
Background
Methodology
Results
Sensitivity Analysis
Conclusion and Recommendations
Intro: Problem Description
U.S. urban highways (congestion)
Traffic growth > road capacity
Cost: delays, contamination and fuel
consumption
ITS Vs. new construction
Importance
Identify strategic roadways that should be
considered in, for ITS deployment.
Allocate resources in high priority routes that
interconnect the most economically
significant counties in the State of California
Promote economic growth and maximum
regional trade opportunities
Objective
Identify the SFC in the state of California
Analyze results through a sensitivity test
Background
Ohio DOT:
Economic and non-economic criteria
Major production and distribution centers Ohio
(nodes)
Link-node Approach (highway network)
Shieh:
Min highway network for LCV
High Standard highways
No circuits
1. Data Processing
Economic Criteria (75%)
Intermodal Facilities (15%)
Border Crossing (10%)
Economic Criteria (1-10)
Based on the Gross State Product
- Income of major industries (REIS)
* Whole Sale
* Retail
* Manufacturing
* Farming
* Construction
Existence of Intermodal facilities
Marine Port: Major marine ports
(U.S. Marine Port Authority)
Airport: Major cargo airports (FAA)
Rail / Truck: Transfers (FHWA)
Border Crossing
Location of international commercial border
crossings: U.S. – Mexico
(Customs and Border Protection)
Some Examples of Categories
Aggregation of Results

Add weighted
scores of different
categories and
summarize into 3
classes:
Rank 1: 8-10
Rank 2: 6-8 (16%)
Not eligible: <6
Assumptions
Access-controlled
High standards of design
Geometry
Bridge clearance
Turning radius
2. Network Analysis
Overlay of road map
on aggregated map:
Select Best Route
“Virtual Cost” based
on road type
Network Analysis Cont’d
Connect high economic counties first
Perform two more network analyses for
the other counties in the north and south
respectively
Route Development
Analysis of the Freight Corridor


Exclude stops that were
generating circuits or
were redundant
Only the County of
Contra Costa was
excluded from the
corridor
Buffer zones
Multiple rings with
10 miles in between
were drawn in order
to check proximity of
principle sites to
SFC
Sensitivity Test
Five more Counties were
included by lessening the
economy activity weight
by 30% and increasing
the
weight
of
the
transportation facilities.
New Freight Corridor
I - 15
I - 10
I - 40
US 101
I – 80
I-5
Fresno Co. was left out
from the SFC
Buffer Zone:
Radii of 10 miles
Conclusion and Recommendation
The assignation of the freight corridor is
susceptible to the weights assigned to criteria
Better approach: Number of truck trips to and
from each production and distribution center
Better cost: average velocity
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