CityCyclingEdinburgh Forum » Infrastructure

"Centreline removal trial"

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  1. chdot
    Admin

    "

    Conclusion

    The data recorded in this study and subsequent analysis shows that there was a statistically significant reduction in vehicle speeds as a result of removing central markings on the carriageway.

    It is important to note that not all roads would be suitable for removing central markings, particularly where the markings highlight a particular hazard. If the technique is being considered, careful analysis of the site will be required to determine if it is appropriate.

    "

    http://www.tfl.gov.uk/cdn/static/cms/documents/centre-line-removal-trial.pdf

    Posted 9 years ago #

  2. HankChief
    Member

    Why are speeds higher with centre lines?

    Getting into the ‘minds’ of drivers is not easy. A theory is that centre lines and hatching can provide a psychological sense of confidence to drivers that no vehicles will encroach on ‘their’ side of the road. There can also be a tendency for some drivers to position their vehicles close to a white line regardless of the traffic conditions, believing it is their ‘right’ to be in this position. Centre line removal introduces an element of uncertainty which is reflected in lower speeds.

    Although not identifiable in the data, it was noted on site that speeds of individual vehicles appeared to be particularly lower when they were passing other vehicles travelling in the opposite direction. This supports the theory that uncertainty and additional cautiousness is responsible for the speed reduction

    Posted 9 years ago #

  3. dougal
    Member

    But who can really get in the minds of drivers?

    Posted 9 years ago #

  4. sallyhinch
    Member

    OR even the 'minds' of drivers!

    Posted 9 years ago #

  5. HankChief
    Member

    It will be crowded in their minds as many have it concentrated on what their phone is telling them, what the radio is playing, what to have for tea etc.

    Posted 9 years ago #

  6. sallyhinch
    Member

    To be fair, my mind is fairly often not on the job on my bike too... hopefully only on the quieter roads, but miles can go by without me noticing some days

    Posted 9 years ago #

  7. crowriver
    Member

    @sallyhinch, aye but you're not sitting in a ton of steel, glass and rubber travelling at 50mph, are you?

    Posted 9 years ago #

  8. I were right about that saddle
    Member

    The best way into the mind of the typical driver for most of us will be to examine our own minds. I notice myself thinking quite differently behind the wheel of a motor car compared to how I think at the controls of a motorcycle or on a bicycle.

    Car driving makes me feel entitled and distant, like an absentee landlord.

    Posted 9 years ago #

  9. Instography
    Member

    The 40cm of extra cycle lane makes a huge difference.

    Posted 9 years ago #

  10. sallyhinch
    Member

    @crowriver - that's *why* I'm not sitting in a ton of steel, glass and rubber travelling at 60mph.

    Posted 9 years ago #

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