The Colnbrook Experimental Road
Page 48
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"DEFERENCE has already t ,en Xt./made in these columns to the Ministry •of Transport's experimental road, Harmondsworth, but for the information of drivers and other users of the Cohibrook by-pass we would point out that this new portion was opened to traffic on Wednesday last
It is about 600 yds.
in length and lies adja cent and parallel to part of the by-pass road, its location being shown in the accompanying diagram. The important point is that the length of the, Colnbrook by-pass parallel to the experimental road was closed when the latter was opened to traffic. In order to direct the attention of vehicle drivers to this fact, notices have been erected on the verge of the original road, reading "Bear right (or left) ahead 100 yds.," and signs "London" or "Slough," as the case may be, are erected just where the experimental road branches off the main section. The width of the carriageway of the new portion is only 20 ft., whilst that of the by-pass is 30 ft., the narrower carriageway being selected because it is desired with this series of testa to have only tWo traffic streams, one up and one down, thus entailing increased loading over the road surface.
All the sections are of
concrete with variotis features of design and construction in the different slabs. It is expected that the information to be obtained from these experiments will he a considerable value, and the co-operation of all drivers of vehicles onthe by-pass is sought ins. carrying out the tests.