--- a/python/traffic_engineering.py	Sat Jul 23 02:18:16 2011 -0400
+++ b/python/traffic_engineering.py	Mon Aug 08 14:47:30 2011 -0400
@@ -65,6 +65,31 @@
         return self.qmax
 
 #########################
+# intersection
+#########################
+
+class FourWayIntersection:
+    '''Simple class for simple intersection outline'''
+    def __init__(self, dimension, coordX, coordY):
+        self.dimension = dimension
+        self.coordX = coordX
+        self.coordY = coordY
+
+    def plot(self, options = 'k'):
+        from matplotlib.pyplot import plot, axis
+    
+        minX = min(self.dimension[0])
+        maxX = max(self.dimension[0])
+        minY = min(self.dimension[1])
+        maxY = max(self.dimension[1])
+        
+        plot([minX, self.coordX[0], self.coordX[0]], [self.coordY[0], self.coordY[0], minY],options)
+        plot([self.coordX[1], self.coordX[1], maxX], [minY, self.coordY[0], self.coordY[0]],options)
+        plot([minX, self.coordX[0], self.coordX[0]], [self.coordY[1], self.coordY[1], maxY],options)
+        plot([self.coordX[1], self.coordX[1], maxX], [maxY, self.coordY[1], self.coordY[1]],options)
+        axis('equal')
+
+#########################
 # traffic signals
 #########################