I-74 originates or terminates, depending on one's direction of travel, at I-75's mile 4. This interchange is among the most eccentric in the Cincinnati area, at various points involving left side ramps, steep grades, and curved merges. Partial interchanges with Central Parkway and Spring Grove Ave. complicate the situation, and might be eliminated entirely as part of I-75's upcoming reconstruction.
Overhead view of the interchange, facing southwest. The way in which the I-75 to I-74 west ramps formerly
formed an exit to Colerain Ave. can be seen in this photo.
The most interesting aspect of this interchange is the re-use of the old Millcreek Expressway's Colerain Ave. exit ramps as the I-75 to I-74 westbound connection. Designers cleverly incorporated the path underneath an old B&O railroad overpass and presumably the avenue's bridge over the Mill Creek (although I haven't seen a photo to confirm this) into an exit ramp. The southbound Millcreek Expressway ramp turned sharply in order to pass under the railroad bridge. I-74 replaced Colerain Ave. as the destination of these ramps in 1974.
Traveling west on the I-75 north to I-74 west ramp, with the incline to the elevation of I-74 east (the deck above) visible past
the railroad bridge. The merge from I-75 south to I-74 west is located beyond the large pillar at the center of the frame. When
this ramp exited to Colerain Ave. prior to construction of I-74, the intersection was located where the incline can be seen
in this photo.
View looking east from the Ludlow Viaduct. I-75 is center and right, with ramps from I-74 visible at top and the
deceleration lane leading to the sharply curved ramp from I-75 south to I-74 west at center right.
View looking north from a pedestrian bridge over I-75 at the southern part of the interchange. This spot is
always the scene of frantic multi-lane changing as three I-75 lanes and two I-74 lanes merge into a total of four.
The exit ramp from I-75 north to I-74 west that formerly led to Colerain Ave. can be seen at right.
This interchange will be reconstructed as part of I-75's improvements by 2015. The below graphics were taken from www.i75millcreekexpressway.com.
2. Northside / Colerain Expressway Interchange
3. Mt. Airy Forest
4. I-74 points west
5. I-74 Extension?
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