Appendix C - Suggested MUTCD Wording from Denver Workshop Participants
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Standard:
Public agencies or officials having jurisdiction shall use an assessment or management method to maintain pavement marking retroreflectivity at or above the minimum values established in Table 3A-1 for all pavement markings required by this Manual. The minimum retroreflectivity values in Table 3A-1 shall be applied to markings using the following:
- Clean and dry markings
- An average of retroreflectivity values over a representative length of marking
If the retroreflectivity of a pavement marking falls below the minimum values, markings shall be scheduled for replacement when conditions permit.
Option:
Agencies may exclude the following types of pavement markings from the retroreflectivity maintenance guidelines described in this section:
- Markings that are not required by the MUTCD
- Symbols, arrows, and words
| Without RRPMs | With | |||
|---|---|---|---|---|
| Marking Configuration | ≤ 50 mph | 55-65 mph | ≥ 70 mph | RRPMs or Lighting |
With Edge Lines or Lane Lines |
40 | 60 | 90 | 40 |
Yellow Center Line Only |
90 | 250 | 570 | 50 |
Add note that retroreflectivity values (RL) apply to all colors
Speed is the nighttime speed of the road
[There are questions about the values for roads that are curb and gutter or median divided.]
If RRPMs are used to reduce the minimum retroreflectivity level, there shall be at least three in view and in good working condition. [Need to revise “good working condition” to provide a quantitative measure of RRPM performance.]
If roadway lighting is used to reduce the minimum retroreflectivity level, the reduction shall be applied only to those markings that receive an adequate level of illumination from the roadway lighting. [Need to define “adequate.”]
Compliance Dates
2 years to adopt a method
5 years for markings to comply with minimums and methods
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