lane                 package:hdrcde                 R Documentation

_S_p_e_e_d-_F_l_o_w _d_a_t_a _f_o_r _C_a_l_i_f_o_r_n_i_a_n _F_r_e_e_w_a_y

_D_e_s_c_r_i_p_t_i_o_n:

     These are two data sets collected in 1993 on two individual lanes
     (lane 2 and lane 3) of the 4-lane Californian freeway I-880. The
     data were collected by loop detectors, and the time units are 30
     seconds per observation (see Petty et al., 1996, for details).

_U_s_a_g_e:

     data(lane2)
     data(lane3)

_F_o_r_m_a_t:

     Two data frames ('lane2' and 'lane3') each with 1318  observations
     on the following two variables:

     '_f_l_o_w' a numeric vector giving the traffic flow in vehicles per
          lane per hour.

     '_s_p_e_e_d' a numeric vector giving the speed in miles per hour.

_D_e_t_a_i_l_s:

     The data is  examined in Einbeck and Tutz (2006), using a
     nonparametric approach to multi-valued regression based on
     conditional mean shift.

_S_o_u_r_c_e:

     Petty, K.F.,  Noeimi, H., Sanwal, K.,  Rydzewski, D., Skabardonis,
     A., Varaiya, P., and  Al-Deek, H.  (1996). ``The Freeway Service
     Patrol Evaluation Project: Database Support Programs, and
     Accessibility''. _Transportation Research Part C: Emerging
     Technologies_, *4*, 71-85.

     The data is provided by courtesy of CALIFORNIA PATH, Institute of
     Transportation Studies, University of California, Berkeley.

_R_e_f_e_r_e_n_c_e_s:

     Einbeck, J., and Tutz, G. (2006). ``Modelling beyond regression
     functions: an application of multimodal regression to speed-flow
     data''. _Journal of the Royal Statistical Society, Series C
     (Applied Statistics)_, *55*, 461-475.

_E_x_a_m_p_l_e_s:

      plot(lane2$flow, lane2$speed)

