Historical Spring Load Restriction Placement/Removal Dates 2010 20092008 2007 2006 ON OFF ON OFF ON OFF ON OFF ON OFF North 9-Mar 3-May 18-Mar 13-May 18-Mar 13-May 13-Mar 8-May 25-Mar 15-May North-Central 9-Mar 26-Apr 18-Mar 13-May 18-Mar 13-May 13-Mar 8-May 24-Mar 15-May Central 9-Mar 19-Apr 17-Mar 4-May 18-Mar 13-May 11-Mar 4-May 10-Mar 5-May Metro 8-Mar 12-Apr 8-Mar 20-Apr 14-Mar 9-May 11-Mar 27-Apr 8-Mar 22-Apr South 8-Mar 12-Apr 8-Mar 20-Apr 13-Mar 8-May 11-Mar 27-Apr 8-Mar 22-Apr Southeast 8-Mar 12-Apr 8-Mar 20-Apr 13-Mar 8-May 11-Mar 27-Apr 8-Mar 22-Apr New Policy Enacted 2005 2004 2003 2002 2001 ON OFF ON OFF ON OFF ON OFF ON OFF North 26-Mar 20-May 8-Mar 3-May 15-Mar 10-May 27-Mar 22-May 20-Mar 15-May North-Central 26-Mar 20-May 8-Mar 3-May Central 25-Mar 12-May 1-Mar 26-Apr 15-Mar 10-May 19-Feb 16-Apr 19-Mar 14-May Metro 23-Mar 4-May 27-Feb 19-Apr 15-Mar 2-May 18-Feb 15-Apr 18-Mar 13-May South 23-Mar 4-May 27-Feb 19-Apr 15-Mar 2-May 18-Feb 15-Apr 18-Mar 13-May Southeast 23-Mar 4-May 27-Feb 19-Apr 15-Mar 2-May 18-Feb 15-Apr 18-Mar 13-May 2000 1999 1998 1997 1996 ON OFF ON OFF ON OFF ON OFF ON OFF North 26-Feb 22-Apr 18-Mar 13-May 25-Feb 27-Apr 27-Mar 21-May 20-Mar 28-May North-Central Central 25-Feb 21-Apr 3-Mar 28-Apr 25-Feb 27-Apr 17-Mar 19-May 18-Mar 20-May Metro 25-Feb 21-Apr 3-Mar 28-Apr 25-Feb 27-Apr 17-Mar 12-May 18-Mar 13-May South 25-Feb 21-Apr 2-Mar 27-Apr 23-Feb 27-Apr 17-Mar 12-May 15-Mar 20-May Southeast 25-Feb 21-Apr 3-Mar 28-Apr 23-Feb 27-Apr 12-Mar 16-May 15-Mar 20-May 1995 1994 1993 1992 1991 ON OFF ON OFF ON OFF ON OFF ON OFF North 17-Mar 24-May 21-Mar 23-May 15-Mar 17-May 11-Mar 11-May 25-Mar 13-May North-Central Central 17-Mar 15-May 21-Mar 16-May 15-Mar 17-May 9-Mar 5-May 17-Mar 6-May Metro 17-Mar 4-May 14-Mar 4-May 12-Mar 3-May 2-Mar 22-Apr 18-Mar 25-Apr South 17-Mar 15-May 14-Mar 16-May 12-Mar 17-May 2-Mar 4-May 13-Mar 6-May Southeast 17-Mar 15-May 14-Mar 16-May 12-Mar 17-May 4-Mar 7-May 18-Mar 9-May 1990 1989 1988 1987 1986 ON OFF ON OFF ON OFF ON OFF ON OFF North 19-Mar 14-May 29-Mar 15-May 21-Mar 16-May 13-Mar 6-May 24-Mar 19-May North-Central Central 14-Mar 7-May 27-Mar 8-May 14-Mar 4-May 6-Mar 27-Apr 19-Mar 12-May Metro 14-Mar 25-Apr 22-Mar 1-May 14-Mar 25-Apr 4-Mar 13-Apr 17-Mar 28-Apr South 5-Mar 7-May 15-Mar 8-May 14-Mar 4-May 20-Feb 27-Apr 11-Mar 9-May Southeast 12-Mar 7-May 22-Mar 8-May 14-Mar 9-May 20-Feb 27-Apr 17-Mar 12-May Historical_SLR_Placement_Dates.xls 11/1/2010 Average ('86-'10) Duration ON OFF Days Weeks North 17-Mar 13-May 57 8 North-Central 16-Mar 9-May 54 8 Central 12-Mar 5-May 55 8 Metro 10-Mar 27-Apr 49 7 South 8-Mar 2-May 55 8 Southeast 9-Mar 3-May 55 8 Historical_SLR_Placement_Dates.xls 11/1/2010.