Complex sentence: Although recent California Highway Log still propose alternative plans to extend by more peculiar shape, slightly southwest of the I-280/I-380 interchange might make the extension project slightly longer perhaps making the I-380 a bent V-shape.
Split into simpler sentences: Although recent California Highway Log still propose alternative plans to extend the highway in a more peculiar configuration, slightly southwest of the I-280/I-380 interchange. This might make the extension project slightly longer, perhaps bending I-380 a bent V-shape.