Change Lanes to Pass

R4-11aP Change Lanes to Pass

There’s a new sign in town, well it’s actually a plaque, the R4-11aP CHANGE LANES TO PASS (“CLtP”)was just recently added to Arizona’s Manual of Approved Signs (MOAS) in March of 2017.

The sign is available to be added as a plaque in conjunction with the pre-existing R4-11 (Bicycles) MAY USE FULL LANE (“BMUFL”), which made it’s debut in the 2009 edition of the MUTCD, and was finally added to Arizona’s MOAS in June 2013.

Most lanes in Arizona, and elsewhere for that matter, are designed to accommodate only the width of one vehicle, not a

R4-11 Bicycles MAY USE FULL LANE

bicycle and a vehicle side-by-side safely. In this situation, bicyclists need not (legally) ride as far to the right as practicable, but rather are instructed to ride near the center of the lane as best safe practice, this position will make the bicyclist more visible to other motorists, giving them more time to avoid abrupt, unsafe movements.

Below is a typical laned arterial road configuration, this happens to be in Tempe… The lanes are too narrow to share safely side-by-side. Non-standard signs, such as the “Share the Road” should be replaced —

Elliot Road, eastbound east of Priest Drive, City of Tempe. Sign placed by the city reminds users to “Share the Road”. Posted speed limit 45mph. Even the fastest bicyclists will be traveling well below the posted speed limit. This arterial, like most, has lanes which are “too narrow to share safely side by side”, and as such, cyclists going straight ahead are advised to ride near the center of the right-most through lane. Motorists wishing to overtake must change lanes (at least partially) to pass legally and safely.

 

 

 

3 thoughts on “Change Lanes to Pass”

  1. under 2003 MUTCD, when “Bicycles May Use Full Lane” sign was proposed, that “word legend signs of this type may be installed at any time by agencies in accordance with Section 2B.54 of the MUTCD – even if the specific sign isn’t yet in the MUTCD” and that language is referenced here: http://www.ncutcdbtc.org/sponsors/fall05/bike01-bmufl.pdf: “The proposed (Bicycles May Use Full Lane) sign uses a standard symbol and word legend, and therefore is already acceptable for use under Section 2B.54 of the MUTCD. However, the Bicycle Technical Committee believes that there is sufficient demand and justification for creating a standard design and code for this sign message.”
    https://mutcd.fhwa.dot.gov/HTM/2003/html-index.htm

    Fast forward to 2009 MUTCD:
    Section 9B.14 Other Regulatory Signs
    Option:
    01 Other regulatory signs described in Chapter 2B may be installed on bicycle facilities as appropriate.
    http://www.azdot.gov/docs/default-source/business/manual-on-uniform-traffic-control-devices-(mutcd)—2009-edition.pdf?sfvrsn=6

  2. Parts of the Natchez-Trace parkway was (recently?) signed with BMUFL / CLtP signage. Bicyclists are required by federal rules (see two-abreastness) to ride single file; this is not a conflict, just pointless, the lane is too narrow to share so bicyclists (any number of bicyclists, including one) may legally, and should, control the lane, while motorists who wish to travel faster may change lanes to pass when safe.
    See this criminal driver hit-and-run caught on camera running down a bicyclist on the parkway.

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