def IDM_parameters(*args):
    """Suggested parameters for the IDM/MOBIL."""
    # time headway parameter = 1 -> always unstable in congested regime.
    # time headway = 1.5 -> restabilizes at high density
    cf_parameters = [35, 1.3, 2, 1.1, 1.5]  # note speed is supposed to be in m/s
    
    # note last 3 parameters have units in terms of timesteps, not seconds
    lc_parameters = [-8, -20, .6, .1, 0, .2, .1, 20, 20]

    return cf_parameters, lc_parameters