
14 ◾ Software Designers in Action: A Human-Centric Look at Design Work
© 2010 Taylor & Francis Group, LLC
e design prompt does not mention large trucks or emergency vehicles, and individual
vehicle behavior is implicitly limited to the normal lawful behavior of passenger cars. e
design prompt says nothing about speed limits, and the designer may perhaps assume that
a uniform speed limit applies everywhere. Cars do not break down or collide; their drivers
always obey the trac signals and never block an intersection. No road segments or lanes
are closed for repairs.
2.4 SIMULATION OF REAL-WORLD TRAFFIC BY PROGRAMMING OBJECTS
e physica ...