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Welcome to Chris Bennett's and Lis Pedersen's web site. If you are looking for information Chris' current work on affordable housing, please visit www.mygbhousing.info. The video below tells the background to Chris' project.


2018 - USA - Relationship Between Speed and Roughness


2018 - USA - Relationship Between Speed and Roughness

Road and traffic factors that influence speed have attracted interest for modeling vehicle
fuel consumption and traffic safety. While the influence of geometric design and traffic operation factors have been well studied, the relationship between pavement surface roughness and vehicle speed was not well established in previous studies, mainly because of data limitations. The authors applied a new dataset, Naturalistic Driving Study (NDS) data of the Strategic Highway Research Program 2 (SHRP 2), for studying the roughness-speed relationship. A method was developed to identify the roughness-speed relationship under different road and traffic conditions. The International Roughness Index (IRI) was employed to describe the pavement roughness condition in this research. The new method can be applied to reveal a roughness-speed relationship of different road and traffic conditions with the SHRP 2 NDS dataset. The case study shows that pavement surface roughness impacts traffic speed for different full-access control road scenarios with the listed properties. The research conducted will give other engineers a guidance on how to develop a method to predict speed at different Levels of Service (LOS) given similar road properties on an all access roadway.

File Name: 2018_usa_roughness-speed-relationship.pdf
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Created Date: 25-03-2018
Last Updated Date: 25-03-2018


Chris in the NCT Race 

Chris has an adventurous spirit which generally involves cycling, running, or just being out there having a good time. Read his 'Race Reports' below. This is a link to his SPOT GPS tracker. If you are interested in his 'geeky' sport technical blog it is at www.tri-duffer.com. He also has stories of his life as 'An Overtravelled Engineer Working for the World Bank' at World Bank Traveller.


Race Reports


Document Library


  • Chris' published papers and reports are here.
  • His Technical Library  has a range of reports 
  • Golden Bay community projects are here.
  • The history of the ROMDAS company is here.
  • The 'Road to Good Health' HIV/AIDs Toolkit is here.


Technical Library

Chris and Lis

Chris and Lis

We are Lis Pedersen and Chris Bennett. We’ve been married over 30 years and each found our way to New Zealand in the early 1980s from Denmark and Canada respectively. Golden Bay has been our happy place for almost 20 years and we are now based in Pohara just above the beach, with our two cats Coco and Max. 




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