Vertical Clearance - Federal Highway Administration
2014年10月15日 · The specific standards for vertical clearance adopted for the Interstate System maintain its integrity for national defense purposes. On Interstates, the clear height of structures shall not be less than 16 feet (4.9 meters) over the entire roadway width, including the useable width of shoulder.
Chapter 2A - MUTCD 2009 Edition - FHWA - Transportation
All route signs, warning signs, and regulatory signs on freeways and expressways shall be installed with a minimum height of 7 feet, measured vertically from the bottom of the sign to the elevation of the near edge of the pavement.
Chapter 4: Construction Details, Section 56: Overhead Sign …
During sign erection, check for a proper fit between the post and the sign frame. Also, verify the provision of the proper minimum clearances. Verify that the surface finishes of all metal parts of sign structures meet specifications.
FHWA - MUTCD - 2003 Edition Revision 1 Chapter 2A - Transportation
Overhead mounted signs shall provide a vertical clearance of not less than 5.2 m (17 ft) to the sign, light fixture, or sign bridge, over the entire width of the pavement and shoulders except where a lesser vertical clearance is used for the design of other structures.
Sign Guidelines and Applications Manual: Vertical Clearance
CLEARANCE signs (W12-2, W12-2a and W12-4T) need to reflect the vertical clearance between the roadway and the overhead obstruction. This section provides guidelines intended to supplement the Texas Manual on Uniform Traffic Control Devices (TMUTCD).
When an overhead sign is needed, the proper means of support shall be selected. The following is basic guidance for typical circumstances and is not intended to be comprehensive.
Vertical Clearance Signs - Larson Design Group
The requirements for vertical clearance signs have changed; here's what you need to know when replacing old or damaged signs on your bridges.
Chapter 2C - MUTCD 2009 Edition - FHWA - Transportation
02 The actual clearance should be displayed on the Low Clearance sign to the nearest 1 inch not exceeding the actual clearance. However, in areas that experience changes in temperature causing frost action, a reduction, not exceeding 3 inches, should be used for this condition.
Show sign lighting requirements on the Guide Sign Worksheet when sign lighting is required. Include sign lighting calculations in the Lighting Design Analysis Report.
Maintenance Operations Manual: Measuring Vertical Clearance
In locations where an encroachment over the usable shoulder would significantly reduce the vertical clearance, two clearances may be shown. The travel lane and shoulder clearances should be signed independently on the structure.