Frequencies for no_lanes variable in accident dataset :

  Number of |
     Travel |
      Lanes |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          1        0.21        0.21
          2 |        326       67.08       67.28
          3 |         43        8.85       76.13
          4 |        104       21.40       97.53
          5 |          3        0.62       98.15
          6 |          9        1.85      100.00
------------+-----------------------------------
      Total |        486      100.00

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