Syndicate content

Recent comments

  • Reply to: Motorization and its discontents   1 week 4 days ago

    Excellent work Roger and team. We would appreciate some guidance from this work on three issues: (i) policy on age limits of imported cars (Some countries have it, some don't...has this worked? what are the equity implications?); (ii)In the African context, should the focus as you have noted on the need for gradual processes at this time be on crashworthiness (which means airbags for example) or vehicle road worthiness (slightly humbler goals on issues like brakes, lights, reflectors)? Happy to discuss further; (iii) role of public transportation (some people don't necessarily want to use cars but when public transport is chaotic, they have little choice). Very interesting work indeed.

  • Reply to: Are hybrid and electric buses viable just yet?   2 months 2 weeks ago

    The city from which your main image is taken (Gothenburg, Sweden) has gone from being a seriously polluted industrial city to a being a place with remarkably clean air. Traffic is smooth, quiet and calm. Unlike many other cities, Gothenburg never abandoned its extensive tram system, most buildings are heated with district heating, the waterfront areas offer pedestrianised recreation, and the city is full of parks and trees.

    People are healthy, happy and live a long time. How do you put a price on that? It is the result of consistent spending on environment-improving technologies over a period of 40 years. Never forget that Sweden was quite a poor country as recently as the 1950s.

    Gothenburg has countered the downturn in manufacturing in the west by becoming a centre for innovation in many different fields.

  • Reply to: Are hybrid and electric buses viable just yet?   2 months 2 weeks ago

    Thanks Ben for your comment.

    I agree that we face a big challenge in understanding how new technologies will shape the future of transport. All over the World there are new initiatives, sometimes in the informal paratransit sector that can be the seed for your radical change. I agree that mass transit may not be the key factor for transport in the future, as even now it isn't (in many developing countries paratransit services account for two thirds of public transport services). Still, I think the discussion on technology is relevant: First, because it is the governments who bring it to the table. Second, because under certain conditions like high density demand, given that road space is limited, only mass transit systems are efficient.

  • Reply to: Are hybrid and electric buses viable just yet?   2 months 2 weeks ago

    Hi Casper,

    Thanks for the comment. You can take a look at the technical note. We are including PM (US$20,000 per tonne), NOx (US$1,500 per tonne) and CO (US$500 per tonne) economic value of potential savings in the analysis.

    We are not including noise, and would appreciate any good methodology on how to do it.


  • Reply to: Are hybrid and electric buses viable just yet?   2 months 2 weeks ago

    Very good article explaining the economical side of electrification. However, no mention was made to opportunity charging via inductive wireless power transmission. This is the proven solution to keep vehicle cost at the level of conventional diesel due to a very reduced battery pack (by 80%) as compared to overnight charged e-buses. This is very appealing for private bus operators which will have lower operating costs over the lifetime of the vehicle. The cities need to provide the necessary infrastructure to charge every 2nd or 3rd bus stop at 200 kW. For a BRT system it amortize quickly given the very small maintenance of a street integrated infrastructure. Please check this for more information: