Select a question topic:
Question: In travel demand modeling framework, an issue is to be able to identify "empty trucks"...does TREDIS address this?
Answer: TREDIS includes the option of creating unique mode/purpose combinations in order to reflect specialized scenarios of analysis. These customized mode/purposes can then be modified to reflect specific travel characteristics such as a "0" Tons per vehicle to reflect "empty trucks".
Question: What are the trade-offs for using TREDIS with vFreight or Transearch data? If I am evaluating projects at the state level, which source of data is recommended?
Answer: TREDIS Freight analytic capabilities are based on a framework that brings together transportation, economic, and trade data and integrates industry, commodity, and modal perspectives. This framework is adaptive to different freight/trade databases such as vFreight™ and Transearch®.
The primary difference between these freight data sources is the commodity profile at different geographic scales. vFreight includes commodity profiles at the county level and Transearch® at the corridor level. In addition, vFreight™ includes detailed NAFTA trade flow data and a freight visualization package for trade flows at the county level. Transearch® data also includes a visualization feature at the state level and is unique in providing pass through data as well as more specific modal detail for truck and rail modes.
For more information on TREDIS' freight capabilities, please click on the following link: http://tredis.com/products/tredis-freight
The recommended source of freight data depends on geographic level of detail desired. For insights based on commodity flows within a county or groups of counties, vFreight™ data is recommended. For more specified detail on what commodities are being transported on specific corridors, then Transearch® data is recommended.
Question: Can you explain more about the supply chain module and what it does and where the source data comes from?
Answer: The Supply Chain report in TREDIS enables an analysis of how your supply chain affects the economy. This includes an analysis of:
Commodity Flows: by mode, tonnage, value, commodity, and trading partners (based on vFreight™, or Transearch® data)
Industry dependence: which reflects economic activity reliant on inbound flows for production and outbound flows to deliver products to consumers (based on IMPLAN data).
The supply chain feature is also segmented into upstream and downstream categories starting from agriculture/extraction down to final demand. This analytical capability enables users to identify the economic relevance of each part of the supply chain with the associated inbound and outbound commodity flows needed to sustain it.
These analytical features of the supply chain analysis are applicable to both current freight and economic conditions as well as investment scenarios which are important elements of developing economic context and freight planning as part of MAP-21 guidance.