Standards Australia Committee MS/12 is currently developing a standard for Local Area Traffic Management (LATM). This report gives results of comprehensibility tests carried out on different versions of six signs for LATM applications, and visibility tests of marking patterns for road humps. Two or three versions of each sign were tested on independent groups of respondents. In the case of signs for `One-way', `Slow points', `Shared zone', `End shared zone', and `Chicane', all versions performed about equally well, requiring that a choice be made among the alternatives on grounds other than comprehensibility. In the case of the `Modified T-junction priority' and `Left lane ends' signs, one version of each sign could be eliminated on the grounds of the tests, requiring a choice between the remaining alternatives on other grounds. A visibility meter was used to determine the recognition threshold for the different road hump markings, which subjects viewed monocularly at night. The tests allowed a consistent ordering of the five different patterns tested. Further testing was recommended in view of (1) possible confusion of the best-performing pattern with pedestrian crossing markings and (2) probable improvement of the performance of some of the other patterns with broader striping (A).
Samenvatting