The bridge approach is also high on that side, coming off this Southern entry, which is almost a cliff.

Pic from nan.
The only way you can lose direction is going to the left down the ancient maintenance/construction road. Clearly not the case, as the vehicle ended up on the downstream side. Point is, if there were a hippo on the southern entrance uphill, which is extremely unlikely given the steep gradient, that would have lead to leaving the road quite a long way before the bridge, bashing into the embankments there etc.?
For those that know the bridge, firstly it would not be a route for hippo, unless perhaps full frontal on the tar coming from the north, or secondly, the steep incline is a big reason for slowing down, no matter how experienced the driver.
My personal opinion is that it was a simple instance of "Friday night" staff entering after an outing to Phala, and having a drunk-driving accident. But just my opinion!
