Capital Boulevard is a major thoroughfare connecting downtown Raleigh to its northeast suburbs.
Capital Boulevard begins at the north side of Downtown Raleigh at the convergence of southbound Dawson and northbound McDowell Streets. The six-lane urban boulevard carries US 70/401/NC 50 north, squeezed between two rail yards. Capital Boulevard has an interchange with Peace Street and another with Wade Avenue, where US 70 and NC 50 leave Capital to connect to Glenwood Avenue. The roadway turns to the northeast as interchanges with Fairview Road, Wake Forest Road, and Atlantic Avenue follow. The northbound and southbound lanes split as the roadway briefly follows Pigeon House Branch through an industrial area, then merge back together at Crabtree Boulevard. At an interchange with I-440, US 401 is joined by US 1 and Capital widens to eight lanes with sidewalks and numerous signalized intersections. Development between Interstates 440 and 540 is almost exclusively commercial, featuring numerous strip malls and car dealerships. Midway between the two interstates, US 401 leaves Capital Boulevard to follow Louisburg Road, and US 1 continues north along Capital Boulevard, reverting back to six lanes. The roadway then passes by Triangle Town Center as it approaches its interchange with I-540. North of 540, Capital Boulevard transitions to a four-lane arterial road at its intersection with Durant and Perry Creek Roads. The roadway enters Wake Forest after crossing the Neuse River and once again boasts commercial development. Capital Boulevard travels along Raleigh's Wakefield Plantation development before having an interchange with NC 98. The Capital Boulevard designation ends at Purnell Road near the Wake/Franklin County line and US 1 continues north to I-85 in Henderson.
As part of a plan to revitalize and modernize a segment of Capital Boulevard between its southern terminus in Downtown Raleigh to its interchange with I-440, the North Carolina Department of Transportation began work replacing two aging bridges along the corridor. The work began in 2016 with the reconstruction of the bridge carrying Wade Avenue over Capital Boulevard, with the replacement of the Capital Boulevard bridge across Peace Street commencing the following year. Both bridges, built in 1954 and 1948 respectively, were stated to be nearing the end of their design lives and featured substandard geometry at their respective interchanges. The project also redesigns the current trumpet interchange at Wade Avenue and replaces the ramps connecting southbound Capital Boulevard and Peace Street with a "square loop" interchange using Johnson and Harrington Streets. Construction is expected to be completed in spring 2020.
Other improvements include eliminating the Fairview Road interchange by extending West Street to end at Wake Forest Road, extending Six Forks Road its current terminus at Atlantic Avenue to Capital Boulevard, restoring the Pigeon House Branch floodplain as well as constructing parks and a greenway trail connecting Peace Street to Crabtree Creek Trail, narrowing the median between the Atlantic Avenue/Wake Forest Road interchange and Crabtree Boulevard, and adding landscaped medians and sidewalks where missing.
A separate corridor study conducted by the city of Raleigh involves improving the traffic flow and aesthetic appearance of Capital Boulevard between Interstates 440 and 540. Dubbed the Capital Boulevard North Corridor Study, the efforts began in 2018 with preliminary designs currently underway.
Due to rapid growth in northern Wake County, NCDOT is proposing upgrading US 1 to a six-lane median-divided freeway from I-540 in Raleigh to Purnell Road in Wake Forest near the Wake/Franklin County border. The $465 million project will require restricting access to neighborhoods and local businesses to frontage roads, some of which have yet to be built. Construction on the southern mile of the freeway will begin in 2022, with the remainder of the project scheduled to begin construction in 2024. The freeway proposes interchanges at:
- Durant/Perry Creek Roads in Raleigh
- Burlington Mills Road in Wake Forest
- Falls of Neuse Road/South Main Street near Raleigh and Wake Forest
- Harris/Purnell Roads in Wake Forest
- Glenwood Avenue, another major thoroughfare carrying a US highway for much of its route
- Louisburg Road, another major thoroughfare carrying a US highway for much of its route
- Falls of Neuse Road, a heavily-traveled alternative to Capital Boulevard
- Six Forks Road, a major route through North Raleigh
- New Bern Avenue, a former alignment of US 64
- Wake Forest Road, a former alignment of US 1