Spring St. Material Testing this Sunday

0% chance of rain! The weather couldn’t be better for the planned material test on Spring St.

Abundant sunshine. That’s what we have been waiting for, as Spring Street’s green bike lane will finally be undergoing a planned material test starting this Sunday, July 15th. Testing will occur along three blocks; 1st St. to 2nd St., Cesar Chavez Ave. to Arcadia St., and Aliso St. to Temple St. As many of you already know, we’ve had to cancel a number of past material tests due to inclement weather, but it looks like mother nature will be cooperative this weekend

We would like to remind everyone to please be mindful of the cones and to avoid driving on the coned off segments on the day of the installation. If you access driveways/garages on the west side of Spring along these three blocks, entry and exit will be restricted from 1AM-4PM. Be sure to plan ahead – consider moving your car to another street or lot in advance if you know you will need to use your car on this day. More information on these restrictions can be found at the Downtown Los Angeles Neighborhood Council’s website.

For more information about the materials that we will be testing, check out our previous post here – note that test segment locations have changed .

0 replies
  1. Richard Risemberg
    Richard Risemberg says:

    Very nice, but why? I’ve heard all the reasons from LADOT staff and others, but I don’t buy it. It’s odd that we can’t use the paint that, say, San Francisco uses on Market Street–seeing that the Market Street lanes see more car traffic, more bike traffic, and more rain than Spring Street ever will. No traction problems there either–none that I’ve seen reported, and none that I experienced myself in multiple bicycle passages along Market (and other green lanes in the area).

    LA has a history of reinventing the square wheel–we test and test because a process is new to us, but it’s an established and mature technology with supporting literature in other cities, other countries–usually places with far more experience than we have in such matters.

    I come from an engineering family and have studied science, so I’m not against testing–but I’m also not against using reviews of current best (and common) practices to save time by avoiding needless testing.

    Suppose it’s either a CYA move or pure administrative timidity.

    Reply
  2. Christopher Kidd (@BikeBlogChris)
    Christopher Kidd (@BikeBlogChris) says:

    Market street is all asphalt, without the concrete pads of Spring Street. Additionally, since there are center-lane bus boarding islands on market street, there is no wear’n’tear from bus tires on the green lane. Buses cross over the Spring St lanes to reach each stop.
    Also, SFMTA has had to go back and repaint their lanes a few times already, from weathering.

    Reply
  3. Dennis Hindman
    Dennis Hindman says:

    If you type in ‘Evaluation of Thermoplastic Marking Materials’ for a Google search (this ladotbikeblog website does not allow me to post this pdf report directly), the choice at the top of the listings is a report done by the FAA and Federal DOT for airport marking materials. The conclusion on page 28 of the report, or page 38 of the pdf, is that the pull-off strength tests shows that an adhesive is needed for thermoplastic or paint adhesion on Portland Cement. There are also pictures that show longevity comparisons between paint and thermoplastic applications.

    I had posted information about this pdf report when the previous series of tests by LADOTwere scheduled, but this information seems to have been ignored.

    Reply
  4. Dennis Hindman
    Dennis Hindman says:

    There are several studies that were done by the FAA/DOT on airport marking materials. LADOT may want to look up the following studies:

    Polyurea paint material study
    Polyester marking material study
    Adsil glass coating study
    Paint and bead durability study

    Reply
  5. Nate Baird
    Nate Baird says:

    Hi Dennis, we’ve done the same research.

    There are always hyper local conditions at work, and we want to get this right. We also want to compare the costs and sustainability of the various treatments, as well as ease of application. Many of these variables will rely on factors unmeasured or tested by anything in the existing body of research.

    Reply
  6. Kenny
    Kenny says:

    Somewhat odd post given that yesterday was the first day it rained in weeks! But it looks like the rain should be gone before Sunday.

    Reply
  7. Dennis Hindman
    Dennis Hindman says:

    A product that should have been on the test list, instead of the Behr products that are available at Home Depot, is a polymer cement slurry surface treatment called Endurablend made by Tensar.

    My reasons for choosing this product are several fold. It’s likely to last a long time since its a cement slurry applied at least 1/8″ thick and not an epoxy or paint. It can smooth out the surface irregularities like cracks and small potholes on Spring St, while the other products cannot (smoothness of surface is extremely important for the safety and encouragement of cycling as bicycles do not typically have suspensions). It was also used by a contractor for a bus only lane on 1st Ave in New York City specifically because this street has concrete pads:

    http://endurablend.tensarcorp.com/storage/endurablend/EB_CS_NY_NYCBUS_1.11.pdf

    Reply
  8. Mike
    Mike says:

    Someone noted (incorrectly):
    “Also, SFMTA has had to go back and repaint their lanes a few times already, from weathering.”

    That’s inaccurate – the lanes have not been repainted at all – though I’d say they do need a touch up soon. Some paint has been in over 2 years now.

    Reply

Trackbacks & Pingbacks

  1. […] for the first time.  On a similar note, apparently the Spring Street Green Buffered Bike Lane got some new paint over the weekend.  Hope it […]

  2. […] for a new job, Bikes and Hikes LA is looking for in-shape, bilingual tour guides. LADOT will be testing new treatments Sunday for the badly worn Spring Street green bike lanes. BIKAS offers a better than passing grade for […]

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