The N.C. Department of Transportation will increase the speed limit on three major roads in the Triangle by the end of September from the current 65 miles per hour limit to 70 mph, the department said Monday.
The roads are:
• I-540 between Glenwood Avenue (U.S. 70) and I-40;
• All of N.C. 540, including the Triangle Expressway; and
• N.C. 147 between N.C. 540 and I-40.
The NCDOT said it conducted a traffic study of these sections of divided highway, reviewing current speeds, crash data and road characteristics such as lane and shoulder widths to ensure the highways will remain safe for travel at the higher speed.
"These roads are among our safest highways and we expect that they will continue to be," said State Traffic Engineer Kevin Lacy.
A similar increase went into effect last February for the other section of I-540 between Glenwood Avenue and U.S. 64/264.
A contractor is expected to start installing the new speed limit signs this week, weather permitting, with the new law taking effect as the signs are installed. They should all be in place by the end of the month.