[Brian Griffin]

The Israelis mainly use multi-layer fences with ditches and security vehicle access roads.

Walls are mainly used near built-up areas.

Israeli fence/wall designs

http://blog.camera.org/archives/West%20Bank%20security%20fence%20nyt.jpg

https://www.ynetnews.com/PicServer3/2012/10/10/4201702/1_wa.jpg

http://www.jewishvirtuallibrary.org/jsource/images/israel/fence4.jpg

http://svyatoslav.50megs.com/GRAPHICS/2kqa5.GIF

http://www.jpost.com/sites/default/files/BloggersImages/898//image/Israel_Egypt_Barrier.jpg

http://english.al-akhbar.com/sites/default/files/leading_images/141559-01-09.jpg

http://www.aljazeera.com/mritems/Images/2016/2/10/789bae0b1dfe4504a8f0a95bb691e499_18.jpg

http://s.newsweek.com/sites/www.newsweek.com/files/styles/embed-lg/public/2015/10/09/1009palestineisraelwall.jpg

https://i.ytimg.com/vi/wYEmQt_rXqc/maxresdefault.jpg

http://cdn.timesofisrael.com/uploads/2015/10/Mideast-Israel-Palest_Horo-21.jpg

http://thumbs.dreamstime.com/z/israeli-west-bank-wall-3393848.jpg

http://images.jpost.com/image/upload/t_Article2016_Control/261291

note the natural drop:
http://intelligencebriefs.com/wp-content/uploads/2016/05/Kenya-security-wall-construction-File-Photo.jpg

Mexico-Guatemala fence

https://us-east-1.tchyn.io/snopes-production/uploads/2015/08/fence2.jpg

Saudi? fence

http://i1.tribune.com.pk/wp-content/uploads/2013/08/589101-borderindiapakistanphotoreuters-1376288061-556-640x480.jpg

[1Old Pro]

I guess there must be a news blackout on this, any reports of progress?