MUTCD W4-7: HEA VY MERGE FROM LEFT Sign
The W4-7 sign is covered in Section 2C.49 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
- Option · Permitted (may)The HEA VY MERGE FROM LEFT (RIGHT) (W4-7) sign (see Figure 2C-11 ) may be used to supplement a W4-1 sign at multilane approaches to congested areas to inform road users that it is desirable for through traffic to move out of a lane that will be occupied by a high volume of entering traffic. If used, the W4-7 sign may be supplemented with a W16-2P series or W16-3P series plaque (see Secti on 2C.61 ).
- Standard · Required (shall)If used, the W4-7 sign shall be installed at a location upstream from the location of the W4-1 sign.
Where to read the rest
- Full text: MUTCD Section 2C.49: HEA VY MERGE FROM LEFT Sign
- Minimum sign sizes by roadway type are in the size section for this chapter: Section 2C.03
- Mounting height, lateral offset and retroreflectivity for any sign: MUTCD sign placement guide
Source: Manual on Uniform Traffic Control Devices, 11th Edition (Federal Highway Administration, December 2023, public domain). Excerpts are shortened and shown out of context; read the full section before specifying a sign. Your state may still be operating under the 2009 edition or a state supplement. Official manual: mutcd.fhwa.dot.gov.