[Code of Federal Regulations]
[Title 40, Volume 18]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR93.106]

[Page 552-553]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 93--DETERMINING CONFORMITY OF FEDERAL ACTIONS TO STATE OR FEDERAL 
IMPLEMENTATION PLANS--Table of Contents
 
   Subpart A--Conformity to State or Federal Implementation Plans of 
   Transportation Plans, Programs, and Projects Developed, Funded or 
       Approved Under Title 23 U.S.C. or the Federal Transit Laws
 
Sec. 93.106  Content of transportation plans.

    (a) Transportation plans adopted after January 1, 1997 in serious, 
severe, or extreme ozone nonattainment areas and in serious CO 
nonattainment areas. If the metropolitan planning area contains an 
urbanized area population greater than 200,000, the transportation plan 
must specifically describe the transportation system envisioned for 
certain future years which shall be called horizon years.
    (1) The agency or organization developing the transportation plan 
may choose any years to be horizon years, subject to the following 
restrictions:
    (i) Horizon years may be no more than 10 years apart;
    (ii) The first horizon year may be no more than 10 years from the 
base year used to validate the transportation demand planning model;
    (iii) If the attainment year is in the time span of the 
transportation plan, the attainment year must be a horizon year; and
    (iv) The last horizon year must be the last year of the 
transportation plan's forecast period.
    (2) For these horizon years:
    (i) The transportation plan shall quantify and document the 
demographic and employment factors influencing expected transportation 
demand, including land use forecasts, in accordance with implementation 
plan provisions and the consultation requirements specified by 
Sec. 93.105;
    (ii) The highway and transit system shall be described in terms of 
the regionally significant additions or modifications to the existing 
transportation

[[Page 553]]

network which the transportation plan envisions to be operational in the 
horizon years. Additions and modifications to the highway network shall 
be sufficiently identified to indicate intersections with existing 
regionally significant facilities, and to determine their effect on 
route options between transportation analysis zones. Each added or 
modified highway segment shall also be sufficiently identified in terms 
of its design concept and design scope to allow modeling of travel times 
under various traffic volumes, consistent with the modeling methods for 
area-wide transportation analysis in use by the MPO. Transit facilities, 
equipment, and services envisioned for the future shall be identified in 
terms of design concept, design scope, and operating policies that are 
sufficient for modeling of their transit ridership. Additions and 
modifications to the transportation network shall be described 
sufficiently to show that there is a reasonable relationship between 
expected land use and the envisioned transportation system; and
    (iii) Other future transportation policies, requirements, services, 
and activities, including intermodal activities, shall be described.
    (b) Moderate areas reclassified to serious. Ozone or CO 
nonattainment areas which are reclassified from moderate to serious and 
have an urbanized population greater than 200,000 must meet the 
requirements of paragraph (a) of this section within two years from the 
date of reclassification.
    (c) Transportation plans for other areas. Transportation plans for 
other areas must meet the requirements of paragraph (a) of this section 
at least to the extent it has been the previous practice of the MPO to 
prepare plans which meet those requirements. Otherwise, the 
transportation system envisioned for the future must be sufficiently 
described within the transportation plans so that a conformity 
determination can be made according to the criteria and procedures of 
Secs. 93.109 through 93.119.
    (d) Savings. The requirements of this section supplement other 
requirements of applicable law or regulation governing the format or 
content of transportation plans.