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 IIT Research Institute

10 West 35 Street Chicago, Illinois 60616

312/567—4000

Mr. F. Rutyna

-25—

March 8, 1977

U.S. Department of Transportation

Transportation Systems Center

Kendall Square, Cambridge MA 021h2

Dear Mr. Rntyna:

APPENDIX B

Transmitted herewith are two copies of the February 4, 1977 CTA accident analysis which was performed as a "technical directive”

under IITRI Project J6366, Contract DOT-TSC-lOSZ.

ShOuld you have

any questions on any part of it, please contact the undersigned or

Dr. E. E. Hahn.

AL:ms Encl. cc: E. Boyle, UMTA 3~ll Longinow telephone input

Impacted Consist Movement

5 ft 10 ft 15 ft 20 ft

Cordially,

/s/ A. Longinow Manager

Structural Analysis

Collision Sgeed

7.02 mph 7.54 mph 8.25 mph 8.97 mph

(Minimum to cause instability)