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These screenshots aren't great because the guards haven't been moved, and you still can't bypass them without control.
Regarding the main topic: Jebus Cross receives very detailed attention in the rules, and a separate post with illustrations is dedicated to transitions between zones. All answers to your questions are explained there with better screenshots (because the guards have been moved there). You can read it here:
here.
Only masochists play Jebus Cross with slow roads; this point of the rules is outdated =)