MUTCD R3-12a: Preferential Lane Ends Signs

The R3-12a sign is covered in Section 2G.07 of the Manual on Uniform Traffic Control Devices, 11th Edition. Below are the provisions from that section that describe when the sign is used and how it is placed.

What it means and when it is used

• Standard · Required (shall)
  A post-mounted Preferential Lane Ends (R3-12b or R3-12h) sign (see Figure 2G-1 ) shall be installed at least ½ mile in advance of the termination of a preferential lane on freeways and expressways.
• Standard · Required (shall)
  Except as provided in Paragraph 7 of this Section, a post-mounted Preferential Lane Ends (R3-12a or R3-12g) sign shall be installed at the point where a preferential lane and restriction end and traffic must merge into the general-purpose lanes.

Placement and mounting

• Standard · Required (shall)
  A post-mounted Preferential Lane Ends (R3-12d) sign (see Figure 2G-1 ) shall be installed at least ½ mile in advance of the point where a preferential lane restriction ends and the lane becomes a general-purpose lane on freeways and expressways.
• Standard · Required (shall)
  Except as provided in Paragraph 8 of this Section, a post-mounted Preferential Lane Ends (R3-12c) sign shall be installed at the point where a preferential lane restriction ends and the lane becomes a general-purpose lane.
• Guidance · Recommended (should)
  On conventional roads, the distance at which Preferential Lane Ends signs are installed in advance of the termination of a preferential lane and/or restriction should be determined by engineering judgment.

Where to read the rest

• Full text: MUTCD Section 2G.07: Preferential Lane Ends Signs
• Mounting height, lateral offset and retroreflectivity for any sign: MUTCD sign placement guide

Related signs in Section 2G.07