Travel Time to Work for the United States:  1990 and 1980 Census
+-----------------------------+--------------------+-------------------+
|                             |     1990 Census    |    1980 Census    |
|                             +--------------------+-------------------+
|Travel Time to Work          |     Number Percent |    Number Percent |
+-----------------------------+--------------------+-------------------+
|Workers 16 years and over    |                    |                   |
|  who did not work at home.. |111,664,249   100.0 |94,487,095   100.0 |
|                             |                    |                   |
|  Less than 10 minutes...... | 18,257,921    16.4 |16,871,572    17.9 |
|  10 to 19 minutes.......... | 36,980,181    33.1 |31,846,602    33.7 |
|  20 to 29 minutes.......... | 22,436,930    20.1 |18,849,260    19.9 |
|  30 to 44 minutes.......... | 20,053,109    18.0 |15,996,009    16.9 |
|  45 minutes or more........ | 13,936,108    12.5 |10,923,652    11.6 |
|                             |                    |                   |
|Mean travel time (minutes).. |       22.4         |      21.7         |
|  Workers traveling 45 or    |                    |                   |
|    more minutes............ |       58.5         |      59.6         |
+-----------------------------+--------------------+-------------------+
Source:  1990 Census of Population, STF3C.
         1980 Census of Population, General Social and Economic
           Characteristics, United States Summary.
Contact:  Journey-to-Work and Migration Statistics Branch, Population
          Division, U.S. Bureau of the Census, (301) 457-2454.