Frequencies for no_lanes variable in accident dataset :

  Number of |
     Travel |
      Lanes |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         13        2.66        2.66
          2 |        277       56.65       59.30
          3 |          5        1.02       60.33
          4 |        145       29.65       89.98
          8 |         48        9.82       99.80
          9 |          1        0.20      100.00
------------+-----------------------------------
      Total |        489      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016