driving like a little old lady

For the last two days I have driven back and forth to work (10 miles each way) at an average speed of about 25mph, due to 12 inches of snow followed by two days of sub-zero temperatures.  It occurred to me today that I was driving like a little old lady (and so, happily, was everyone else).  Then I realized hey, it's ok.  I am a little old lady - well, at 5 feet 10 inches tall not really little but I'm pretty close to qualifying age wise.  I'm still pondering what someone in their late sixties should be called.  Middle aged definitely doesn't fit but elderly or old seems too harsh.  How about three-quarter aged?  Two-thirds? Seven-tenths?