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Reliability of Road Transport from the Perspective of Logistics Manager and Freight Operators

 

This project has examined congestion impacts across nine sectors and enquired about company reactions to the significant deterioration in road traffic conditions in the UK over the past decade. The study has explored the relationship between traffic volumes along a sample of routes and the variability of transit times. It has used a newly-developed vehicle routing software tool to analyse link- and time-specific traffic flow data obtained for the UK trunk road network from the Highways Agency. This modeling found very close correlations between the earliest and latest arrival times for freight journeys and the distance travelled, confirming the view expressed by logistics managers that most congestion is regular and predictable.

 

In the course of the project a total of 37 managers were interviewed in 28 companies or divisions of companies. Additionally, five visits were made to DCs. Detailed enquiries were made about the impact of congestion on the logistics operations, the relationship between congestion and other sources of unreliability and any measures companies were taking to mitigate the effects of congestion. Analysis of the data revealed wide variations in the relative impact of congestion both within and between sectors. There was little evidence of it causing companies to restructure their logistics systems. Nor, in most cases, was it causing companies to run more vehicles, increase tractor-trailer ratios, carry more inventory or modify internal warehouse design and capacity. Some companies, however, have high exposure to congestion as a consequence of their geography, product type, scheduling constraints and customer requirements. Congestion is clearly impacting more seriously on the cost and quality of their logistics operations.


The final report of this study has just been published at the ITF website and can be downloaded from:


http://www.internationaltransportforum.org/jtrc/infrastructure/networks/documents.html

 

We hope that you find the report interesting and would welcome any feedback. Please contact us on greenlogistics@hw.ac.uk.

 

 
 

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