[!!!!!!!!!!VERY VERY CRUCIAL DISCLAIMER!!!!!!!!!!] The construction and blueprints of the highway are a subject I have in my head, but I couldn't catalogue them, so you'll have to ask me. [The yap that replies to the other yap by @Marica_games] I could navigate the Oort Cloud. Even a cargo truck crashing into a thick wall of bricks could create an opening, allowing anything to enter. If I released my massive troop deployment, it would only demonstrate your apathy. The Jansanians couldn't understand why the Dominion was so antagonistic towards us in the first place. We were the reason the Gem had to cross us to enter the Sol system, making us pivotal to the Dominion's technological advancements, yet we were still regarded as an anomalous extraterrestrial presence. Nevertheless, the Dominion tried to cut off Jansanian military operations by hijacking the highways, not realising that the Jansanians had patrol units stationed at every corner, provided by their seneschals and trade unions. They utilised spacetime distortion fields for strategic advantage. Despite this, the Jansanians had been analysing their terrain for decades using advanced gravito-electromagnetic coordination machines, alongside covert operations to monitor their obvious priorities. Compendiously speaking, we could calculate anything, and we could build almost anything. Regarding construction specifics, we use wormholes to transport materials. Yes, it is significantly more expensive, but it’s the only viable option to support my seneschals in the Milky Way. These misguided individuals thought it would be easy to bring down the true human race, relying on authentic human blood to defend the truths that have been integral since the dawn of humanity. Generally speaking, the highway doesn't even connect to Andromeda, and expecting it to be fragile enough to break is akin to monkeys fighting over a banana, only to starve from exhaustion. So here's the deal: Hand over the Holy Land and Rome, or face financial backlash.
Alright, I'll take a "pessimistic" view of your argument. A Krasnikov tube is a spacetime-engineered shortcut that uses exotic matter to distort the metric, allowing a traveller to make a return (and turning) trip in much less Earth time than normal, while remaining locally relativistic. If the region outside the tube behaves like normal spacetime while the tube itself shortens the effective travel path, then someone inside could arrive sooner than a traveller outside taking the ordinary route. So it is better to think of it as a spacetime shortcut than as a medium that makes everything outside “slow relativistically”, meaning that, regardless of any distance, it could travel instantly. It's a matter of material requisition. Exotic matter requires a ton of procedures, steps, and, most importantly, patience, which isn't much of a deal for the Jansanians for sufficiency in this stuff.