Category:Subseries DSIR 12

Department of Scientific and Industrial Research: Road Research Board

See Note on DSIR series for explanation of the classification system here.

DSIR 12/180

DSIR 12/180a Experimental low level lighting of motorways (1959)

DSIR 12/180b Experimental edge markings for roads with flush verges (1959)

DSIR 12/180c "Yield" signs (1959)

DSIR 12/180d Direction signs in motorways (1959)

DSIR 12/181

DSIR 12/181a Effect of installing signals at the Western Avenue/Greenford Road roundabout (1960)

DSIR 12/181b Effect of installing signals on approaches to roundabout at New York Road Circus, Leeds (1960)