MUTCD M1-8: Numbered Bicycle Route Signs

The M1-8 sign is covered in Section 9D.05 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)
  To establish a unique identification (route designation) for a State or local bicycle route, the Bicycle Route (M1-8 or M1-8a) sign (see Figure 9D-1) may be used.
• Standard · Required (shall)
  The Numbered Bicycle Route (M1-8) sign shall display a route designation and shall have a green background with a white legend and border.

Placement and mounting

• Guidance · Recommended (should)
  If a pictograph is used on the M1-8a sign the maximum dimension (height or width) of the pictograph should not exceed 2 times the height of the route numeral, and should be contained within a green border. The minimum width of the graphic on the M1-8a sign should be ² ⁄3 of the sign width, and the maximum width should be 9⁄10 of the sign width.
• Guidance · Recommended (should)
  If a bicycle symbol is used on the M1-8a sign, it should have a minimum height of ¼ of the M1-8a sign panel height.

Where to read the rest

• Full text: MUTCD Section 9D.05: Numbered Bicycle Route Signs
• Mounting height, lateral offset and retroreflectivity for any sign: MUTCD sign placement guide

Related signs in Section 9D.05