How far apart should signs be placed along the highway?

4 closely spaced signs

The NYS Supplement to the National MUTCD states that “sign installations should be at least 200 feet apart where possible (Section 2A.16).” Signs may need to be spread apart even more to allow drivers to read the sign and properly respond. When signs are too close together, it is more likely that the driver will not be able to read them all. The distance in feet between the signs should be 5 to 7 times the speed limit. The table show recommended spacing. Note that the speed should be the higher of the speed limit or the 85th percentile speed.

Speed (mph)

Sign Separation (feet)

30 150-210

35

175-245

40

200-280

45

225-315

50

250-350

55

275-385

60

300-420

References

Cover of the CLRP workshop manual, Basics of a good road

Traffic Signs and Pavement Markings (pdf)
CLRP workshop manual

 

 

 

 

 

NYS Supplement to the Manual on Uniform Traffic Control Devices (MUTCD)
NYSDOT

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This work by the Cornell Local Roads Program (CLRP) is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported License.