/strong>) returns a "driver" object capable of driving
a Vehicle object through random waypoints.  The waypoints are positioned
inside a rectangular region bounded by +/- <strong>dim</strong> in the x- and y-directions.

</p>
<h2>Options</h2>
<table class="list">
  <tr><td style="white-space: nowrap;" class="col1">'speed', S</td> <td>Speed along path (default 1m/s).</td></tr>
  <tr><td style="white-space: nowrap;" class="col1">'dthresh', D</td> <td>Distance from goal at which next goal is chosen.</td></tr>
