The Wyoming Game and Fish Department and Wyoming Department of Transportation are asking motorists to be especially alert when traveling through the construction zone on Wyoming Highway 89 south of Jackson. Construction crews are building a wildlife-proof fence that will force wildlife to use the underpasses to safely cross under the highway, but the fence is not yet complete and some animals, primarily elk, are finding their way into the highway right-of-way. This month alone, there have been several elk struck by vehicles in that area. Mobile electronic signs have been placed at both ends of the construction zone warning motorists to be alert for animals on the highway. Game and Fish officials say when the fence is complete, likely next spring, it will force most animals to safely cross by using the established underpasses. Still, they say that will require a learning process for the animals which will probably take a year or two.