will be included in that standard metropolitan statistical area with which it is most closely integrated as measured by the application of criterion 3(b).

CRITERIA FOR DESIGNATION AND DEFINITION OF STANDARD CONSOLIDATED STATISTICAL AREAS (SCSA)

A standard consolidated statistical area always includes two or more contiguous standard metropolitan statistical areas which meet the following criteria of size, urban character, integration, and contiguity of urbanized areas.

1. One of the standard metropolitan statistical areas has a population of at least 1 million.

2. At least 75 percent of the population of each standard metropolitan statistical area is urban.

3. The sum of the number of workers commuting between the two standard metropolitan statistical areas is equal to:

a. at least 15 percent of the employed workers residing in the smaller standard metropolitan statistical area, or

b. at least 10 percent of the employed workers residing in the smaller standard metropolitan statistical area, and

(1) the urbanized area of a central city of one standard metropolitan statistical area is contiguous with the urbanized area of a central city of the other standard metropolitan statistical area, or

(2) a central city in one standard metropolitan statistical area shares the same urbanized area with a central city in the other standard metropolitan statistical area.

The title of each standard consolidated statistical area shall include the name of the largest central city in each standard metropolitan statistical area plus any central city of 250,000 or more, except that in no case shall the area title include the names of more than three central cities. The cities shall be listed in the order of the population size of the standard metropolitan statistical areas with which they are associated. A regional title may be substituted for the title determined by this criterion.

124 M.C.C.

Resident population within concentric bands of selected cities'-Continued

Figures presented represent the percent of metropolitan population living in a 60 mile ring which would be included in specific commercial zones under both the present and proposed formula.

D = Currently a "defined" city, F = currently a “Formula” city.

'The numbers in parenthesis represent the appropriate distance in miles from the city limits.

The Interstate Commerce Commission has, on its own motion, instituted a rulemaking proceeding for the purpose of proposing an expansion of the populationmileage formula used to determine the commercial zones and terminal areas of motor carriers and freight forwarders. The proposed formula is set forth in Section I of the draft environmental impact statement.

3. Summary of Environmental Impacts:

Approval of the proposed formula expansion may result in a decrease in the amount of interlining and mileage which is currently involved in performing service to shippers located in outlying metropolitan areas.. Current patterns of metropolitan land use may be affected to some degree.

4. Alternatives Considered:

1. No action.

2. Eliminate the population-mileage formula completely.

3. Expansion of proposed formula.

4. Adoption of the ring approach rather than the contour approach.

5. Different formula for cities having physical limitations.

6. Use of SMSA's or SCSA's.

5. Comments Have Been Requested From:

Council on Environmental Quality

Environmental Protection Agency

Department of Transportation

Department of Commerce

Economic Development Administration

Federal Energy Administration

Department of Housing and Urban Development

Department of the Interior

Department of Labor

Office of Management and Budget

All parties to this proceeding

6. Date Made Available to CEQ and the Public:

Date of service of this report.

1. Description of the Action.

The Interstate Commerce Commission, on its own motion, has instituted a rulemaking proceeding in order to determine whether commercial zones and terminal areas of motor carriers and freight forwarders should be redefined. As a first step in this proceeding, a Notice of Proposed Rulemaking was published in the Federal Register on August 22, 1975, wherein the public was informed that the Commission is considering modification of the present rules and invited to comment on appropriate methods to determine commercial zones and terminal areas. The Commission has further indicated that consideration will be given to the impact of any rule changes on the conservation of scarce resources and the impact on the environment.

Based on consideration of the representations filed in response to the Notice of Proposed Rulemaking, the Commission has proposed changing the populationmileage formula for commercial zones as follows: