Additional lanes and improved interchanges are short-term solutions to the growing congestion on I-15 through south Davis County.

But within the next two decades, a second highway west of the freeway needs to be built, according to a study by the Wasatch Front Regional Council.Planner Doug Hattery conducted the study of I-15 from 600 North in Salt Lake City to 200 North in Kaysville and has been presenting his findings to the affected cities.

According to Hattery, an additional lane in each direction needs to be added within three to five years to I-15 between the I-215 on-ramp south of Woods Cross and the U.S. 89 interchange.

The lanes can be added within the existing right of way, Hattery said.

The next priority is to redesign interchanges at Woods Cross, Bountiful, and Centerville, lengthening the on-ramps and separating frontage road and on-ramp entrances to lessen confusion, he said.

But the real need within the next decades is construction of a West Davis Highway, Hattery said.

A second freeway is the best solution, Hattery said, but with money tight the county may have to settle for a limited-access expressway instead.

Hattery presented three different plans of how the Burke Lane interchange in Farmington could be altered to increase access to west Farmington and possibly tie into a west county highway.

None of the three is simple and Farmington officials appeared cool to all three at a recent joint meeting of the City Council and Planning Commission.

Hattery admitted all three have problems but said tying the freeway, U.S. 89, and a second west county highway together by altering an existing interchange is difficult.

City officials in Farmington, Centerville, and Kaysville are all interested in opening up more access routes to their areas west of I-15.

Converting the existing overpass at Glovers Lane in Farmington would entail taking out about half of a new subdivision on the northeast quadrant, an option Hattery said is probably unacceptable.

It would also require closing the on- and off-ramps to the north that serve Lagoon, which would also probably be unacceptable, he said.

Centerville city officials suggest construction of an interchange at Lund Lane, the boundary between Centerville and Farmington.

That would require building a high, long overpass to span the railroad tracks running parallel and west of I-15, which Hattery said is also expensive.

There are also possibilities at the Shepard Lane and Burton Lane overpasses, Hattery said, and converting the unfinished rest stop between the two into an interchange.

While viewing the Burke Lane interchange plans with skepticism, Farmington officials said they favor better access in the Shepard Lane area to serve the city's growing commercial and retail area there.