The full report can be downloaded here:

TENTacle final report by Cliff Hague.pdf

For more reading: 

http://tentacle.eu

Scandinavian Borderland case

Vidzeme mobility plan: http://www.tentacle.eu/a/uploads/bilder/VPR_Insert_02_2019.pdf

About high sped railways: UIC brochure

high_speed_brochure.pdf