Design, operation, and utilization of changeable-message signs with emphasis on the retating-drum type.

Author(s)
Dunne, S.B.
Year
Abstract

Although tables are presented on the functions and types of changeable-message signs available, the rotary drum type is singled out for special attention. Basically, it is described as a triangular-shaped drum pivoted on each end, mounted within an enclosure with rotors attached to each face bearing the message sign. Two types of remote control systems are described.

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Publication

Library number
B 7338 (In: B 4229 S) /73.1/ IRRD 209204
Source

In: Highway Research Board HRB Special Report, No. 129, 1972, p. 233-36, 2 tab.

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