Merge branch 'master' of git.uclalemur.com:mehtank/traffic-scratch

README.md

+Requires scipy >= 0.18.0
+
+idmlin.py : creates class IDMLin, which encapsulates a linearization of the IDM car following model
+
+See: https://en.wikipedia.org/wiki/Intelligent_driver_model for IDM parameters T, a, b, s_0, v_0
+
+In traffic, actual equilbrium velocity will be v_e, with ratio r_e = v_e / v_0.
+
+sample usage:
+
+```python
+# Initialize driver parameters T, a, b, s_0
+idm = IDMLin(T = 1.5, a = 1, b = 3, s0 = 2)
+
+# Set specific driving conditions v_0 and r_e
+idm.go(30, 0.5)
+
+# Compute big matrix A for a loop of 22 cars:
+a = idm.loop(22)
+```
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