PROJECT DESCRIPTION

MOT-SR49-1073

PID 104849

ODOT proposes to improve the I70/State Route 49 interchange in Clay Township, Montgomery

County. State Route 49 is currently a four-lane divided freeway from its interchange with

Interstate 70 to US 40. State Route 49 is expected to have an average daily traffic of

approximately 15,000 vehicles per day in the design year (2036).

In April 2014, ODOT completed a Safety Study of State Route 49, from SLM 10.73 to SLM

12.00). This corridor includes the interchange ramps and the State Route 49 intersections with

Brookville-Salem Road, Pleasant Plain Road, and the intersection with US 40. During the study

period (2010 to 2014), the corridor experienced 72 crashes, including one fatality (on the

southbound State Route 49 ramp to eastbound Interstate 70) and 27 injuries (38% of crashes).

Of these, 14 of the crashes occurred at the intersection of State Route 49 and Brookville-Salem

Road. The Safety Study noted that, due to the separation of the northbound and southbound

travel lanes, this intersection functions as two separate intersections.

Within the project corridor, the Safety Study indicated three areas where there are clusters of

crashes: The intersections of Brookville-Salem Road and State Route 49 and the southbound

State Route 49 ramp onto eastbound Interstate 70. The Safety Study concluded that the primary

contributing factors to these crashes included vehicle speed, geometry, and driver inattention.

Under the proposed project, the following improvements will be made:

SR 49 will be transitioned from a four-lane divided highway to a two-lane undivided

highway between Interstate 70 and the approach to Pleasant Plain Road. The existing

southbound SR 49 pavement will be utilized for the undivided roadway. The existing

southbound SR 49 bridge over Razor Run will be widened to accommodate the modified

cross-section.

The existing separated northbound travels lanes of SR 49 from Interstate 70 to the approach

to Pleasant Plain Road will be removed. The northbound SR 49 bridge over Razor Run will

be removed.

The existing separated northbound and southbound intersections of SR 49 and Brookville-

Salem Road will be consolidated into a single intersection. The intersection will be

signalized.

On the approach to Pleasant Plain Road, SR 49 transitions back to a divided roadway. The

northbound and southbound lanes of SR 49 will be restriped as single through lanes from

Pleasant Plain Road to the existing two-lane undivided roadway north of US 40.

The existing SR 49 interchange with Interstate 70 will be converted to a half diamond, with

T-intersections at the ramps. The westbound I-70 ramp to SR 49 will be stop-controlled.

The pavement for the existing flyover ramps will be removed. The eastbound ramp bridge

over Razor Run will be left in place.

Consideration was given to consolidating the northbound and southbound travel lanes from the

approach to Pleasant Plain Road to the project’s terminus at the existing two-lane SR 49 corridor.

However, traffic analysis indicates that level of service at the Pleasant Plain Road intersection

degrades when this bifurcated intersection is consolidated.

Construction is expected to occur in the summer of 2019 and require approximately six months.

Traffic on Interstate 70 will be maintained consistent with the Permitted Lane Closure Policy.

One lane in each direction is expected to be maintained on SR 49.

In general, the project will occur within the existing public right-of-way. Minor temporary or

permanent acquisition of up to 0.2-acre may be required from the northwest quadrant of SR 49 at

Brookville Salem Road, to allow for construction and the new signalized intersection.

The project is located in a predominantly agricultural area, with scattered commercial and

residential properties dating to the mid-1900s. Within the Census Blockgroups that include the

project corridor, minorities represent 1% to 17% of the population; individuals in poverty

represent 3% to 9% of the population.

Along the project corridor, there are no National Historic Landmarks, sites listed or known

eligible for the National Register of Historic Places, or sites for which Ohio

Historic/Archaeological Inventory forms have been completed.

The project will require work within Razor Run, to allow for the widening of the existing

southbound SR 49 bridge and the removal of the existing northbound SR 49 bridge. Razor Run

is a warmwater habitat with a drainage area of approximately 3.5 square miles at the project

location. Wetland areas and suitable wooded habitat are present within the project area,

primarily at the SR 49 bridges. Multiple potentially jurisdictional ditches are present within the

corridor and may be impacted by construction. Portions of the project are located within the

designated special flood hazard area associated with Razor Run.

The project is funded federal and state System Transportation and Safety funds. Environmental

clearance is scheduled for 12/01/2017. The project is expected to award in April 2019.

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MONTGOMERY COUNTYUnincorporated Places

Airports

Mile Markers 2 mile

Interstate Routes

Proposed Interstate Routes

U S Routes

Proposed U S Routes

State Routes

Proposed State Routes

Ramps

County Roads

County Sub Division Streets

Proposed County Roads

County Roads (Right of Way only)

Township Roads

Township Sub Division Streets

Township Roads (Right of Way only)

Proposed Township Roads

Municipal Streets

Railroads

County Boundary

City Boundary

Township Boundary

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Revised: April - 2015

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MOT-49-1073PID 104849

Trotwood, Ohio Quadrangles