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McKinley Ave.: Expressway or is it a truck route?
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The yellow line shows the proposed alignment of McKinley Avenue that’s before the Manteca Planning Commission on Tuesday night. The white areas south of the Highway 120 Bypass on the aerial photo are approved developments that have yet to turn dirt. - photo by Courtesy City of Manteca
The future extension of McKinley Avenue is turning into the Sybil project of the Community Development Department.

First, they want the roadway that will eventually swing eastward from the Highway 120 Bypass and connect with a new interchange on Highway 99 south of the existing Austin Road interchange to be developed as an expressway.

Then they roll out a general plan traffic circulation element that says it should be a truck route.

The two street development standards are clashing personalities in terms of traffic movements.

Two weeks ago, staff presented the draft traffic circulation element for the general plan that serves as Manteca’s blueprint for growth that designated McKinley as a truck route. The commission took no action.

This Tuesday, the commission will conduct a hearing on the preferred alignment corridor for McKinley Avenue. The meeting is at 7 p.m. at the Civic Center, 1001 W. Center St.

A staff report for Tuesday’s meeting notes the proposed McKinley Avenue would be in accord with the circulation pattern for future development as provided by the existing Manteca general plan circulation element. However, they believe the commission should give consideration to revising the proposed draft revision to the traffic circulation element to discourage truck traffic on the future McKinley extension and to promote its use primarily as an expressway for residents to reach surrounding highways.

The proposed alignment is the result of three workshops conducted with residents in South Manteca. Their input framed the recommendation for the alignment being proposed on Tuesday. It does not go through any existing residences.

McKinley Avenue is being developed as the boulevard to Manteca’s future.

Today it has no freeway interchanges, passes through no development of consequence, and dead ends on the south at Woodward Avenue.

At some point in the future it could have two interchanges - one on the Highway 120 Bypass and the other that promises to be among the busiest on the Highway 99 corridor in San Joaquin County - pass through the 1,037-acre Austin Road Business Park plus Tara Business Park, and could reach Jack Tone Road and beyond.

The connecting segment of McKinley between the two freeways may not be built for 10 to 30 years.

It is expected to be the southernmost major thoroughfare in Manteca thanks to the reality of an area to the south of its general alignment that’s rated as likely to flood therefore making it prohibitive to urbanize without extremely costly levee improvements.

It will be designed as the city’s first expressway. That means few intersections, no driveways, no gas stations, and no commercial whatsoever.

A number of those intersections - in a bid to discourage it from being used as a high-speed shortcut when commute traffic is heavy on the Highway 120 Bypass - could have traffic circles. Initial construction west of the future southern alignment of Atherton Drive when it is extended south of Woodard Avenue will have a slightly depressed drainage swell down the middle with one lane running in each direction.

McKinley ultimately will be six lanes between the Highway 99 interchange that will also cross the Union Pacific Railroad tracks proposed to the south of the existing Austin Road interchange. From Austin Road to Main Street - now South Manteca Road - will more than likely be four lanes. The remaining segment to Woodward Avenue is expected to be two lanes.