Dear All,
I am working on Vehicular Networks and on a problem that is concerned with the %age of public buses in metropolitan cities.
What would be the safe assumption to make as to what is the percentage of public buses of the total vehicular density in urban scenarios? Somewhere I read that public buses would be 25 to 30% of the total vehicular density in the urban scenarios, but I cannot find the reference.
Any resource and/or reference would be highly appreciated.
Good Morning Rasheed
I agree with Vladimir. The percentage of public transport depends on many factors such as car ownership, average income level, parking cost, availability of public transport network, cost of public transport, frequency of public transport etc. Public transport plays key role in India and Singapore whereas private transport is dominant in major US cities. Please contact public transport companies and get some idea. Tube traffic counters and CCTV at cordon area will provide details of vehicle distribution. Then using automatic number plate matching software, it is possible to work out the percentage of public transport. However, privacy will be an issue.
Best regards
Ravi
Dear Vladimir and Ravi, Thank you so very much for your responses.
Indeed I was asking about the share of buses from the total number of vehicles in the metropolitan cities.
@Vladimir: I totally understand your point, but in Seoul, South Korea, I am sure the percentage of share would easily above 20% because the city is densely populated with public buses. So it depends on city as well.
@Ravi: Yeah you are right, but I am simulating my idea (let say using public buses for message ferrying) and want to calculate the degree of connectivity among cars and public buses. My aim is not to find the percentage of buses but to distribute the buses among vehicular nodes.
I resumed this work after a while, and I had some reference that mentioned the number I wrote above, but I cant find it anymore.
I really appreciate you guys' response.
Best regards,
Rasheed Hussain, PhD
the answer depends on jurisdictions. In Australia buses for peak hour transport are franchised out in Melbourne.Additionally one has long term supplemental charters for school special interests. Sydney too has a similar pattern as does Perth,In Sri Lanka there is a majority of private provision and special bussing provided by firms and the state sector playing a role in long distance transport.
Again what is a "bus" some countries allow 16-32 seaters to be abused as public transport- with people squeezed in like sardines.
Again you should look at Auckland which seems to integrate travel by car and last mile by bus quite well. Refer the ATRF conference papers which are good.
on further reflection in Australia approaching VicRoads or RTA NSW or from ABS stats you can get a statistic to start with.thereafter you need to interpret the same with care.
Dear Hussain,
In polish metropolitan area it is different, becouse they are several public transportation, e.g.: buses (one and more administrators) + tramps, buses + trains + tramps, etc.). For example, in Poznan (Poland) population number of 550 000 permanent residents + about 100 000 temporary residents (students):
- main operator of public bus system in Poznan city - about 300 buses
- others operators (Poznan Distict) - about 100 buses
For transportation economics, several indicators might be considered as relevant :
the modal share of public transit (which include the metro if necessary) : this is the share of trips made by public transportation in a given area (often in France the area where the public transit networks are planned. This indicator is not fully satisfactory because some trips can use both private cars and public transit. In this car the trips are considered public transit.
The vehicle "density" , which measures the percentage of bus in a given perimeter, sometimes, the perimeter is restricted to a street or an artery between two points. In that case the bus density can reach 80-90 %. In a tunnel in Lyon this id 100%.
Hi Rasheed. Check out the "Transportation Statistics Annual Report".
http://www.rita.dot.gov/bts/sites/rita.dot.gov.bts/files/tsar_2012.pdf.pdf
Dear Marcin, Dominique and Sadra, Thank you so much for your valuable answers. Really appreciated.
In worst case, the share of public transport by buses could be as low as 3 to 5 %. An excellent example could be the Surat city situated on the western coast of India. It has an area of 326 sq.km and it is a home to a population of 4.6 million (equivalent to the population of New Zealand), but only 128 buses were deployed by the City municipal corporation (local body). Also, the share of public transport is as low as 5%.
So, it totally depends on the characteristics of the city and its residents as far as the share of public transport is concerned.
A better approach could be a quick pilot survey to get a rough idea about the share of public transport mode (buses). If you want to know just the share of the public transport buses among the total vehicles in a city, then there might be some local government body where all vehicles get registered before getting on to the road.
With regards
Ashu S. Kedia
I agree with Ashu and Kolita,
I would add density (of population) and urban form. Usually, you can have access to traffic with the help of transit company. regular survey provide a measure of car traffic But the modal share is not the same in all parts of the city (in the center of Paris public transit accounts for more than 50 % of the trips, but in the outer suburbs it is less than 5 %.
But you are interested in vehicle density which is another matter. ..
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