I read an article this morning about the
Tanzanian government moving forward with a highway through the Serengeti plain just south of the Tanzania-Kenya border. I then followed through to a link about a group opposing this and their site titled
Save the Serengeti. On their site they have the map below showing the proposed route as well as an alternate route that has been proposed to the south of the national park and conservation areas.

To give some perspective on the vast size of this park, just the park alone is about 5700 square miles, about the size of Connecticut and Rhode Island combined or compared to Yellowstone National park, which is about 3400 square miles. The conservation areas surrounding the Serengeti, including Masai Mara NP in Kenya more than double the size of this contiguous area of conservation.
Below, there is a picture of mine from when I visited the Serengeti and was taken from atop a rock outcrop. It would be strange to see a black line running through the unbroken flat piece of green land.

The conservation groups opposing this are accurate about the danger of animal crossings for the animals but they don't even mention the danger to people on the highway. I saw the remnants of an Elephant v. Semi-truck collision on a highway in Botswana and neither end of that collision came out a winner.