_dta:
  1.  by Jean Roth , jroth@nber.org , 1 Dec 2015

  obs:       110,240                          
 vars:            10                          1 Dec 2015 08:46
 size:     1,543,360                          (_dta has notes)
---------------------------------------------------------------------------------------------------------------
              storage   display    value
variable name   type    format     label      variable label
---------------------------------------------------------------------------------------------------------------
state           byte    %8.0g                 state number
st_case         long    %12.0g                consecutive number
eventnum        byte    %8.0g                 event number
veh_no          byte    %8.0g                 vehicle number
veventnum       byte    %8.0g                 vehicle event number
vnumber1        byte    %8.0g                 vehicle number (this vehicle)
aoi1            byte    %8.0g                 areas of impact (this vehicle)
soe             byte    %8.0g                 sequence of events
vnumber2        int     %8.0g                 vehicle number (other vehicle)
aoi2            byte    %8.0g                 areas of impact (other vehicle)
---------------------------------------------------------------------------------------------------------------
Sorted by: st_case  eventnum  veh_no  veventnum