roll = new Array()
roll[0]="http://sdite.org/images/charlotte.jpg";
roll[1]="http://sdite.org/images/roundabouts_c.jpg";
roll[2]="http://sdite.org/images/roundabouts_n.jpg";
roll[3]="http://sdite.org/images/superstreet.jpg";

rolltext = new Array()
rolltext[0]="I-77 and I-485 Interchange in Charlotte, North Carolina";
rolltext[1]="Highway 153 and Lake Resort Drive Roundabout Interchange in Chattanooga, Tennessee";
rolltext[2]="N. C. State University Roundabout in Raleigh, North Carolina";
rolltext[3]="US 15-501 Superstreet in Chapel Hill, North Carolina";