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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.


2015 - India - Studying Effect of Weight-To-Power Ratio on Acceleration Profile of Trucks under Varying Gradient Conditions


2015 - India - Studying Effect of Weight-To-Power Ratio on Acceleration Profile of Trucks under Varying Gradient Conditions

The effect of grade is very significant on traffic flow characteristics. While negotiating a particular upward gradient, the vehicles will have to overcome the grade resistance additionally along with other resistances (air resistance, rolling resistance and resistance due to inertia). An important aspect of road geometry design is the provision of safe distances to allow vehicle to change speed from low or moderate speed flows to high speed flows, and vice versa. On level roads, vehicles may maintain their speeds uniformly. However, on upgrades, heavy vehicles such as trucks, will experience significant reduction in their speeds, whereas, passenger cars and other smaller vehicles such as motorized-two-wheelers may experience relatively lesser speed reduction. Similarly, the effect of gradient on truck performance on upgrade and downgrade are not same. One of the approaches, to estimate the acceleration rates of truck for different grades to develop the various traffic flow models. The main objective of this study is to study the effect of weight-to-power ratio on truck accelerating characteristics for varying magnitude of gradients. The outcome of the study is expected to explain the dynamics of trucks on grades.

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Created Date: 25-06-2019
Last Updated Date: 28-03-2018


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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