Chapter 2B. Regulatory Signs
The Weight Limit (R12-1) sign carrying the legend WEIGHT LIMIT X t (XX TONS) may be used to indicate vehicle weight restrictions including load.
Where the restriction applies to axle weight rather than gross load, the legend may be AXLE WEIGHT LIMIT X t (XX TONS) or AXLE WEIGHT LIMIT XXXX kg (XXXX LBS) (R12-2).
To restrict trucks of certain sizes by reference to empty weight in residential districts, the legend may be NO TRUCKS OVER X t (XX TONS) EMPTY WT or NO TRUCKS OVER XXXX kg (XXXX LBS) EMPTY WT (R12-3).
In areas where multiple regulations of the type described above are applicable, a sign combining the necessary messages on a single panel may be used, such as WEIGHT LIMIT X t (XX TONS) PER AXLE, X t (XX TONS) GROSS (R12-4).
Posting of specific load limits may be accomplished by use of the Weight Limit symbol sign (R12-5). A sign containing the legend WEIGHT LIMIT on the top two lines, and showing three different truck symbols and their respective weight limits for which restrictions apply may be used, with the weight limits shown to the right of each symbol as X t (XX T). A bottom line of legend stating GROSS WT may be included if needed for enforcement purposes.
If used, the Weight Limit sign (see Figure 2B-20) shall be located in advance of the applicable section of highway or structure.
If used, the Weight Limit sign with an advisory distance ahead legend should be placed at approach road intersections or other points where prohibited vehicles can detour or turn around.
An ALL TRUCKS/COMMERCIAL VEHICLES NEXT RIGHT (R13-1) sign (see Figure 2B-21) should be used to direct appropriate traffic into a weigh station.
The R13-1 sign should be supplemented by the D8 series of guide signs (see Section 2D.44).
The reverse color combination, a white legend and border on a black background, may be used for the R13-1 sign.
Figure 2B-21 Truck Signs
The TRUCK ROUTE (R14-1) sign (see Figure 2B-21) should be used to mark a route that has been designated to allow truck traffic.
On a numbered highway, the TRUCK auxiliary sign may be used (see Section 2D.20).
The Hazardous Material Route (R14-2) sign (see Figure 2B-21) may be used to identify routes that have been designated by proper authority for vehicles transporting hazardous material.
On routes where the transporting of hazardous material is prohibited, the Hazardous Material Prohibition (R14-3) sign (see Figure 2B-21) may be used.
If used, the Hazardous Material Prohibition sign should be installed on a street or roadway at a point where vehicles transporting hazardous material have the opportunity to take an alternate route.
The signing of the National Network routes for trucking is optional.
When a National Network route is signed, the National Network (R14-4) sign (see Figure 2B-21) shall be used.
The National Network Prohibition (R14-5) sign (see Figure 2B-21) may be used to identify routes, portions of routes, and ramps where trucks are prohibited. The R14-5 sign may also be used to mark the ends of designated routes.
Regulatory word message signs other than those classified and specified in this Manual and the "Standard Highways Sign" book may be developed to aid the enforcement of other laws or regulations.
Except for symbols on regulatory signs, minor modifications in the design may be permitted provided that the essential appearance characteristics are met.
When a seat belt symbol is used, the symbol shown in Figure 2B-22 shall be used.
The seat belt symbol should not be used alone but in connection with mandatory seat belt regulatory messages.
Figure 2B-22 Seat Belt Symbol