Nemetschek Allplan becomes exclusive supplier of BIM software to the newly formed Autobahn GmbH that now builds and maintains Germany\u2019s 13,000km freeways and trunk roads: 2,850 licenses for 52 offices. allplan.com/us_en
In the United Kingdom, there is normally no need for red or yellow "arrow" lights, and no provision for them in law. Layouts are typically simple, either a plain three-disc all-directions signal; the same with a green left or right "filter" arrow which lights up either independently of the main green (permitting a left or right turn at an otherwise red light) or along with it (showing that any conflicting traffic has been stopped so turning traffic does not need to yield); or in multiple full sets where the horizontal positioning and lane layout (particularly where lanes are segregated by kerbs or islands) denotes which directions are stopped or free to move. However, the lack of red and yellow arrows can lead to unusual setups with non standard road layouts, such as a staggered entrance and exit to a busy retail park at one side of a mostly 2-lane (plus turning lane) road. The exit crossing has a normal set of 3-way lights (with the slight oddity that small numbers of vehicles can be momentarily "trapped" inside the junction by the inward-facing red light), as exiting traffic conflicts with both travel directions on the main road. However, the entrance crossing (from the side opposite the complex) only conflicts with oncoming traffic as it is a one-way system, and traffic on that side of the road conflicts with nothing; indeed at times it is itself mostly exit-traffic. Stopping it at the same time as the entrance flow would cause unnecessary congestion. With multi-colour arrows available, a simple all-turn red/yellow/green set could be installed, and the turning lane slightly kerbed off to make the division plain. In their absence, it is easy to mistake a red disc as an "all stop" signal... so, the straight ahead direction gets a solo permanently lit straight-ahead arrow, bolted onto the side of a red disc, yellow disc, and conflicting-turn green arrow triplet.
Nemetschek AllPlan BIM 2008 License setup free
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