Lab5: The Highway
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If we are going to model a chunk of the Interstate through Austin, we need a
way to visualize the action we expect to see.

To get started on our simulation, we need to set up a screen where we can see
all the vehicles traveling along the highway. There is a problem with this. The
highway is long, and our computer screen is short. The solution I came up with
is to break the highway up into short strips, and show traffic moving along
each strip.

Vehicles will enter at the left edge of the top strip, move along that first
strip, and leave at the right edge. Then, they will appear on the left edge of
the next strip below, and move along that one. They repeat this process until
they reach the final strip exit point. At that point, we remove them from the
simulation.

Highway Construction
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Gather up a bunch of orange cones. We need to build a highway!.

To build this part of the simulation, we need a class that will represent the
highway. Here is the start of a class specification you can use to build this
part of the simulation.

..  literalinclude::	code/Highway.h
    :linenos:
    :caption: Highway.h

All you need to do for this lab is make your application draw the highway
system we will use for the rest of the project. You will see an example of this
system in class.