Maintenance Level of Service

The
Maintenance Management Manual
 establishes guidelines for planning and performing various maintenance activities in accordance with available funds. Three possible funding levels are defined: desirable (the highest), acceptable, and tolerable (the lowest). Maintenance priorities are assigned based on the level of funding, and maintenance forces are directed to “substantially maintain” the various highway components accordingly.
Chapter 3
of the
Maintenance Management Manual
 explains the concept in detail, and
Section 2
includes the maintenance level of service guidelines for highway illumination.
For general guidelines on maintenance practices related to highway illumination, see the
Maintenance Operations Manual
, Chapter 4,
Section 3
.