Frequencies for no_lanes variable in accident dataset :

  Number of |
     Travel |
      Lanes |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          1        0.18        0.18
          2 |        476       83.36       83.54
          3 |         72       12.61       96.15
          4 |         20        3.50       99.65
          6 |          1        0.18       99.82
          9 |          1        0.18      100.00
------------+-----------------------------------
      Total |        571      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016