[[where should this go??]]
In order to systematically test this intersection logic, an
intersection test suite was implemented. This test suite goes through
several different intersection layouts and tests them one by one if
the dynamics behaves according to the specifications. The results
typically look like as shown in Fig. .
In this particular example, one link with 500veh/sec and one link
with 2000veh/sec merge into a link with a capacity of 500veh/sec.
The curves are, for different algorithms, time-dependent accumulative
vehicle numbers for the two incoming links. In this case, one sees that
until approx time-step 3400, both links discharge at rates 400 and
100veh/sec, respectively. After that time, the first link is empty, and
the second link now discharges at 500veh/sec. Not all algorithms are
similarly faithful in generating the desired dynamics; the thick black
lines denote results from the algorithm that got finally implemented.
For further details, see (20).
[[there is in fact a 3rd case, see daganzo network cell transmission: outgoing links and ONE incoming link congested, other incoming link not congested. Do we catch that? Do we have to?]]
|