---
kind: "section"
citation: "23 C.F.R. § 490.607"
title: "23"
number: "490.607"
heading: "National performance management measures to assess freight movement on the Interstate System."
url: "https://uscodex.org/cfr/23/490.607"
---

# §490.607. National performance management measures to assess freight movement on the Interstate System.


The performance measure to assess freight movement on the Interstate System is the: Truck Travel Time Reliability (TTTR) Index (referred to as the Freight Reliability measure).


## Notes

### Source

Source: 82 FR 6044, Jan. 18, 2017, unless otherwise noted.

### Authority

Authority: 23 U.S.C. 134, 135, 148(i) and 150; 49 CFR 1.85.

### Source

Source: 81 FR 13913, Mar. 15, 2016, unless otherwise noted.