The Smell of Molten Projects in the Morning

Ed Nisley's Blog: Shop notes, electronics, firmware, machinery, 3D printing, laser cuttery, and curiosities. Contents: 100% human thinking, 0% AI slop.

Category: Recumbent Bicycling

Cruisin’ the streets

  • Traffic Signal Timing: Burnett Blvd at Rt 55, With Traffic

    We ride through the intersection at the Rt 55 end of Burnett Blvd a lot, because it’s the only route between Raymond Avenue and the Dutchess Rail Trail. Previous posts have documented the signal timing, but this sequence shows the situation we’ve feared from the beginning… cross traffic not stopping because we are in the intersection with an opposing green light.

    I’m towing a trailer with three bags of groceries.

    The sequence numbers indicate the frame at 60 f/s.

    T +0.000 = our signal just turned green:

    Burnett at Rt 55 2015-12-14 - 0096 - Green
    Burnett at Rt 55 2015-12-14 – 0096 – Green

    T +1.250 s = the drivers ahead of us release their brakes and begin rolling:

    Burnett at Rt 55 2015-12-14 - 0171 - Green start
    Burnett at Rt 55 2015-12-14 – 0171 – Green start

    T +2.400 s = we begin rolling:

    Burnett at Rt 55 2015-12-14 - 0240 - Green rolling
    Burnett at Rt 55 2015-12-14 – 0240 – Green rolling

    It’s worth noting that we cannot start any earlier, unless you regard jumping the green and passing cars at an intersection as Good Practices, which we don’t.

    T +7.217 s = the yellow signal goes on in our direction:

    Burnett at Rt 55 2015-12-14 - 0529 - Yellow
    Burnett at Rt 55 2015-12-14 – 0529 – Yellow

    That’s six whole seconds from the time the cars started rolling and 4.8 s from the time we started.

    Notice the white car to our right that’s stopped in the leftmost eastbound lane of Rt 55.

    T +12.100 s = our signal turns red:

    Burnett at Rt 55 2015-12-14 - 0822 - Red
    Burnett at Rt 55 2015-12-14 – 0822 – Red

    I’ve reached the middle of the intersection, Mary’s about centered on the three eastbound lanes of Rt 55.

    T +13.333 s = the opposing signal turns green:

    Burnett at Rt 55 2015-12-14 - 0895 - Opp Green
    Burnett at Rt 55 2015-12-14 – 0895 – Opp Green

    Traffic in both directions of Rt 55 can now begin moving, but the white car remains stopped; it’s almost directly behind me in the leftmost lane. Because Mary is following the curved line guide lines, she’s just entering the rightmost lane. What you can’t see is a black car approaching from behind her that didn’t have to stop.

    T +20.950 s = the car in the right lane that didn’t have to stop passes me:

    Burnett at Rt 55 2015-12-14 - 1353 - First car
    Burnett at Rt 55 2015-12-14 – 1353 – First car

    I’m 140 feet from the stop line (figured with the distance calculator):

    Burnett at Rt 55 - Intersection distance
    Burnett at Rt 55 – Intersection distance

    At 40 mph = 60 ft/s, that car passed the stop line 2.3 s earlier, at T +18.7 s, when I was still crossing the right lane.

    It’s entirely likely that the driver didn’t see either of us while approaching the intersection, because he (let’s assume a he for the sake of discussion) had a green light nearly 5 s = 300 ft before reaching the stop line. Unless he’s paying more attention than most drivers, he was intent on the signal to judge whether he must slow down; for the last 7.3 s he’s known that the intersection is clear, because nobody else should be in the intersection against his green signal.

    T +24.667 s = The white car in the left lane passes Mary:

    Burnett at Rt 55 2015-12-14 - 1576 - Second car
    Burnett at Rt 55 2015-12-14 – 1576 – Second car

    All I’m asking NYSDOT to do is lengthen the signal timing so we’re not caught in the middle of the intersection by opposing traffic with a green signal. Adding a few seconds onto the yellow and minimum cycle time doesn’t seem unreasonable, but it’s been six months since I reported the problem with no action; I’ve pinged their Bicycle & Pedestrian coordinator several times with no response.

    If their engineers are “studying” the situation, it’s not producing any visible results; they haven’t asked me for any additional data.

    I Am Not A Lawyer, but I think my collection of photos should provide sufficient evidence to convince a jury that NYSDOT is totally liable for any bicycling injuries at that intersection, based on the inability of cyclists to meet the signal timing. I really don’t want to find out if I’m right…

  • Bike Helmet Earbud Replacement

    A bag arrived from halfway around the planet, bearing five sets of cheap earbuds. There was no way to tell from the eBay description, but they’re vented on the side:

    Cheap earbud - side vent detail
    Cheap earbud – side vent detail

    And also to the rear, down inside those deep slots below the chromed plastic cover:

    Cheap earbud - back openings
    Cheap earbud – back openings

    The raised lettering is a nice touch; the other earbud has a script L.

    The PET braid over the fragile wire should withstand a bit more abuse than usual. The strain relief isn’t anything to cheer, though, consisting of that rectangular channel with the wire loose inside. I figured I’d start minimal and fix whatever crops up; I have nine more earbuds to go.

    The motivation for all this was having the Gorilla Tape peel off the helmet, leaving a hardened mass of glue behind, then snagging the earbud wires. This is the new, somewhat better protected, wiring:

    Bell Helmet - mic-earbud wire - hardened tape adhesive
    Bell Helmet – mic-earbud wire – hardened tape adhesive

    In a triumph of hope over experience, I applied more Gorilla Tape:

    Bell Helmet - re-taped mic-earbud wiring
    Bell Helmet – re-taped mic-earbud wiring

    The helmet may need replacing after another iteration or two.

    My solid modeling hand has become stronger these days, so I should gimmick up a flat-ish wart anchoring the mic boom and all the wiring to the helmet shell.

  • Family Christmas Ride

    This doesn’t happen very often nowadays:

    The Family That Rides Together - DCRT near Parker - 2015-12-25
    The Family That Rides Together – DCRT near Parker – 2015-12-25

    That’s in the rock cut just east of the tunnel under Parker Avenue. In a normal winter, that rock wall completely shadows the asphalt and preserves an icy layer through March.

    We rode out-and-back over the Walkway, with a few digressions along the way:

    Christmas Ride 2015 - APRS track
    Christmas Ride 2015 – APRS track

    A good ride was had by all; we could get used to those empty roads…

     

  • Squirrel Sprint

    Rolling through the back of the Vassar Campus, watching a murder of crows on the lawn, when all of a sudden:

    Fast Squirrel - 0258
    Fast Squirrel – 0258

    That squirrel passed about three feet in front of Mary’s bike, running flat out and, at 60 frame/s, touched the ground every 200 ms:

    This slideshow requires JavaScript.

    Figuring a squirrel body+tail is 1.5 ft long and it covers 3 of those units with every leap, it’s moving at 22 ft/s = 15 mph. That’s about as fast as we travel…

  • Sony HDR-AS30V vs. STK NP-BX1: Power Estimate, Redux

    After 95 minutes on a pleasant ride with temperature around 55 °F, the STK C battery had 0.59 W·h remaining (dark green trace):

    Sony NP-BX1 - STK used - Wh scale - 2015-12-12
    Sony NP-BX1 – STK used – Wh scale – 2015-12-12

    The last time around, it had 1.85 W·h after 61 minutes. Subtracting the two (and ignoring that it may have started with slightly different charges and behave differently at different temperatures) says the camera used 1.26 W·h = 76 W·min in 34 minutes, which averages out to 2.2 W.

    That’s close enough to the “a bit over 2 W” figured from those partial-to-empty measurements for me.

    The discharge tests from early November:

    Sony NP-BX1 - Wasabi FG - STK ABCD - Wh scale - 2015-11-03
    Sony NP-BX1 – Wasabi FG – STK ABCD – Wh scale – 2015-11-03

    The best STK battery (D) holds just under 4.2 A·h, so its absolute longest run time could be 110-ish minutes. That graph shows the A cell was just about done after 75 minutes, so changing the battery after an hour still makes sense; you never know what will happen during the last few minutes of a ride…

  • Monthly Science: APRS Coverage Near Red Oaks Mill

    APRS tracks for my rides around Poughkeepsie in early November 2015:

    APRS Coverage - Highland to Hopewell - 2015-11
    APRS Coverage – Highland to Hopewell – 2015-11

    Turning on the topo data and squinting at the Red Oaks Mill area:

    APRS Coverage - Red Oaks Mill area topo - 2015-11
    APRS Coverage – Red Oaks Mill area topo – 2015-11

    The topography isn’t in my favor, with two ridgelines between Red Oaks Mill and the two APRS nodes near Poughkeepsie. APRS coverage southwest of Red Oaks Mill along the Mighty Wappingers Creek (basically, Vassar Road) ranges from spotty to nonexistent, because that route has even worse topography.

    Seems to me an APRS iGate in Red Oaks Mill, running Xastir (perhaps headless) on an RPi, conjured from my heap (perhaps with a shiny new TNC-Pi atop the RPi, rather than an ancient Kantronics KPC-9612), and using a vertical VHF antenna in the attic (because lightning), might improve the situation.

    That whole project continues to slip into the future, but at least I have more motivation and linkies…

  • Traffic Signal Timing: Burnett Blvd. at Rt 55, Redux

    Just in case you think reporting a problem to NYSDOT will actually produce any action:

    Burnett at Rt 55 2015-11-08 - Yellow 5 s after green
    Burnett at Rt 55 2015-11-08 – Yellow 5 s after green

    Apparently, NYSDOT’s bicycle safety criteria allow greenlighting opposing vehicles onto bicyclists in the middle of intersections, so there’s no particular urgency to fix this non-problem.

    They’ve been “studying” that situation, without contacting me for any further information, since July, so you can decide how much they’ve accomplished thus far. I know NYSDOT employees get offended when you call them liars to their face, but they have never, ever produced any evidence showing that I’m wrong.

    Yeah, call me a cynic.