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Old 06-14-17, 05:59 AM   #1
CrankyOne
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Accurate Bicycle & Pedestrian Counts using vision analysis ?

Minnesota have just published their updated manual for counting people walking and riding bicycles:

Research Reports | University of Minnesota Center for Transportation Studies

There are several downsides to the methods included such as overall cost, installation cost and accuracy (two people riding side by side will be counted as one so guesstimates of this must be made in data).

With all of the vision technology available (Tesla Autopilot, facial recognition systems, etc.) I'd think that analysis of a video image would be cost effective and much more accurate. Is anyone familiar with this?
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Old 06-14-17, 07:13 AM   #2
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Originally Posted by CrankyOne View Post
Minnesota have just published their updated manual for counting people walking and riding bicycles:

Research Reports | University of Minnesota Center for Transportation Studies

There are several downsides to the methods included such as overall cost, installation cost and accuracy (two people riding side by side will be counted as one so guesstimates of this must be made in data).

With all of the vision technology available (Tesla Autopilot, facial recognition systems, etc.) I'd think that analysis of a video image would be cost effective and much more accurate. Is anyone familiar with this?
Cost was mentioned twice... I think that is your answer... they want it cheap, and are not willing to pay for the super high tech ID on the fly stuff.
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Old 06-15-17, 06:50 AM   #3
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I was the one who mentioned cost twice. The report itself was quite agnostic on it.

I don't know that a video based counter would be that expensive. It's becoming fairly common tech.
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Old 06-15-17, 11:48 AM   #4
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Minnesota have...
Minnesota have (?)

Correction:
Minnesota has

Example: Is Minnesota a state? or Are Minnesota a state?
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Old 06-15-17, 11:54 AM   #5
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Minnesota have (?)

Correction:
Minnesota has

Example: Is Minnesota a state? or Are Minnesota a state?
Knowing people from there, I'd say a bit of both applies.
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Old 06-16-17, 12:12 AM   #6
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The answer is that an air hose (for cars and probably bikes), much like that found to ring the bell when you pulled into an old fashioned gas station is what triggers a little counter box at the curb. Manual observations are just not going to work with the traffic flows these days and when you divide the count by two, you get roughly the correct number even with mutli-axle trucks coming by occasionally.

For pedestrians you place the hose etc. under a plate or board they are certain to walk on.
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Old 06-16-17, 03:44 AM   #7
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Some kind of a counting box (pneumatic tube, interrupted beam, etc), is likely the cheapest method of gross counting.

Video analysis will come, and could be a cheap easy way to differentiate between pedestrians and cyclists. In theory, video analysis could also be used to identify through cyclists. If there was a large enough web of traffic cameras, one might be able to even get a rough estimate of the total number of cyclists in a city, and exclude duplicates.
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Old 06-16-17, 10:56 AM   #8
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Pneumatic tubes are rather inaccurate. They don't count many lighter weight riders nor people riding side by side. Worst, they don't count pedestrians. The side by side thing can be estimated such as perhaps 20% are missed so increase count by 20%. Maybe the same for lightweight riders.

Pneumatic tube + interrupted beam can sort of figure out pedestrians (beam count - tube count = pedestrians) except for the side by side thing or a lightweight bicycle rider who trips the beam but not the tube. This is an expensive combination to install though, thus my thought that a single video camera should be able to do a much more accurate count for less expense.
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Old 06-18-17, 04:42 PM   #9
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The City of Boston started doing visual analysis counts last summer and fall. There were some manual counts that coincided with the automated ones to determine accuracy; but I don't know what they found.
The primary stated reason for switching over was to be able to do 24hour counts on multiple days to get better data - previously they relied on volunteers to do two-hour counts on nice days in late September. They can also easily do counts throughout the year and in most any weather.
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Old 06-18-17, 10:25 PM   #10
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Minnesota have (?)

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Minnesota has

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Minnesota



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Old 06-18-17, 10:26 PM   #11
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Pneumatic tubes are rather inaccurate. They don't count many lighter weight riders nor people riding side by side. Worst, they don't count pedestrians. The side by side thing can be estimated such as perhaps 20% are missed so increase count by 20%. Maybe the same for lightweight riders.

Pneumatic tube + interrupted beam can sort of figure out pedestrians (beam count - tube count = pedestrians) except for the side by side thing or a lightweight bicycle rider who trips the beam but not the tube. This is an expensive combination to install though, thus my thought that a single video camera should be able to do a much more accurate count for less expense.
I trigger the lights if I roll over the loops.
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Old 06-19-17, 05:09 AM   #12
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I trigger the lights if I roll over the loops.
Ottawa has some loop detectors on bike paths. One of them drives a counter board. They use Strava as well.
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Old 06-19-17, 10:04 AM   #13
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Minnesota have (?)

Correction:
Minnesota has

Example: Is Minnesota a state? or Are Minnesota a state?
I'll let you take that up with the Queen (from where American english comes from). If a single individual person does something then you can say that 'Joe has collected data...', when speaking about a group then 'they have collected data...' or 'Minnesota have collected data...'
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Old 06-19-17, 10:06 AM   #14
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Ottawa has some loop detectors on bike paths. One of them drives a counter board. They use Strava as well.
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I trigger the lights if I roll over the loops.
I don't think either of these can collect data on people walking?

From a bicycle perspective I'd think you could do several loops across a path to collect data on side-by-side riders?
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Old 06-20-17, 10:52 AM   #15
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Pneumatic tubes are rather inaccurate. They don't count many lighter weight riders nor people riding side by side. Worst, they don't count pedestrians. The side by side thing can be estimated such as perhaps 20% are missed so increase count by 20%. Maybe the same for lightweight riders.

Pneumatic tube + interrupted beam can sort of figure out pedestrians (beam count - tube count = pedestrians) except for the side by side thing or a lightweight bicycle rider who trips the beam but not the tube. This is an expensive combination to install though, thus my thought that a single video camera should be able to do a much more accurate count for less expense.
theyre the standard over here in the lowlands, and im sure they work for children, with the amount of schoolkids we have, if you replace the tube with a plate it should work while walking?
or like the ir beam stores use for their doors?
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