Percentage of NHS Pavement in Poor Condition

Maintaining the existing transportation network and improving state of good repair are substantive priorities of ON TO 2050. Ride quality provides a good measure of user experience of the facility, and is also an indicator of the region’s level of reinvestment in existing infrastructure. This indicator measures the percentage of National Highway System (NHS) lane miles in the region that have “poor” ride quality. The NHS used for this analysis is the one defined in MAP-21 (Moving Ahead for Progress in the 21st Century), the current federal surface transportation act. This measure is a federally required performance measure under MAP-21.


All 2,428 lane miles of interstate should be in “fair” or “good” condition by 2050 (currently 1.8 percent “poor”). Non-interstate NHS roads should have fewer than 14 percent of 6,590 road miles in “poor” condition (currently 31 percent). Achieving both of these targets would result in a regional value of no more than 10 percent of NHS roads in “poor” condition, achieving the Illinois Department of Transportation’s (IDOT) target, down from 23.1 percent today. This would bring the CMAP region to the same condition as the remainder of the state is in today.

2025: 19.3 percent or less of NHS lane miles in “poor” condition

2050: 10.0 percent or less of NHS lane miles in “poor” condition

Graphical representation of data follows. You can skip to data download
Percent of NHS pavement in poor condition
  •   All NHS roads
  •   Non-interstate roads
  •   Interstate
CMAP analysis of the Federal Highway Administration's Highway Performance Monitoring System.
Line graph showing percent of NHS pavement in poor condition.

GO TO 2040 Context

This indicator is new to ON TO 2050. It has replaced GO TO 2040’s “Percentage of National Highway System with Acceptable Ride Quality” indicator as part of CMAP’s efforts to align plan indicators with the MAP-21 performance measures where significant overlap exists.