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Jean Barish's avatar

Thank you for shining a light on these scams. It's great to have such a strong advocate for good government.

Jagspaints's avatar

I find these financial cuts to NPS angering and heartbreaking.

As for the sensors on Sunset Dunes “park” I agree Rec and Park’s data collection methods are self-serving with a goal to support propaganda that will be spread to districts in San Francisco far from this so-called park’s location to encourage voters who never visit the area to vote against the Great Highway being shared with commuting drivers only on weekdays. Sharing isn’t their thing.

I’m not sure what skewed methods of counting the visiting population to this park are being used now, but I personally looked into the eco-counters they used when they first closed the road and they were greatly flawed.

At that time they used eco-counters. I researched after Sunshine requests for the information, and called the Canadian company that sold the eco-counters to RPD to find out how they worked and was told by them how and why they are not exact counts. The following is the information I was told:

1. The eco-counters are heat sensors triggered by heat producing entities that pass by them within a certain range. The entities could be a person, an animal, a vehicle. There is no video.

2. Once the counter records a pass, the data remains in the eco-counter box on the road for 24 hours. At the end of the 24th hour, it empties its record into a server located in Rec and Park’s offices. A Rec and Park employee then looks at the data and is supposed to differentiate and remove any counts that look like they might have been made by something other than a person. So, for example, a person going by might count as one pass, but a vehicle going by may count as 500 passes. The human being in the office looking at the data should know not to count the vehicle or whatever registered as 500 passes.

3. Someone pacing back and forth in front of the counter 10 times will be counted as 10 people. Someone walking or riding a bike in one direction and then returning and passing the eco-counter on the way back will be counted as 2 people.

4. Some sensors are able to count only 15 feet in front of them, some as many as 50 feet. The Great Highway has 4 10-ft lanes plus a 10-ft median. Eco-counters were placed at crosswalks 2 on the east side, 2 on the west side, some able to detect heat 50-ft away. In those cases one person walking north or south over the crosswalk in a lane closest to the median was counted as 4 people. If they walked back the same way over the same crosswalk, they were counted as 8 people.

How was it determined how many bicyclists, dogs, wheelchair users, pedestrians were using the closed highway? Rec and Park got their interns and pro-closure volunteers to go to the highway with pens and pads in shifts of a couple hours to write down what they observed. It happened on a few days. There were no independent checks on any of this.

Were these Rec and Park employees and volunteers accurate? Were the ones in charge of recording the data from the servers accurate? Who knows? What do you believe?

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