5/17/16 Update: The bug has been fixed by EA. You should no longer run into this problem. I'll leave the text below for reference.
|This is where it normally gets stuck. No matter how many unemployed workers you have, they just don't make it to the construction site.|
Alas, a work-around for the bug has been discovered! It was originally found by someone on a Japanese SimCity messageboard and then later described on a Japanese SimCity wiki site.
The Space Center Great Work Bug -- Solved!
The reason that the workers never arrive to the great work construction site is that the road from the space center to the regional freeway does not connect properly. In order to get the intersection properly connected, you can use Skye's Regional Freeway Mod to create a 4th leg to the intersection. There's only a small amount of space to do this because the railroad is in the way, but you can place a short dead-end segment between the intersection and the tracks. (Editor's note: Not every map has a railroad across the street. Just build a 4th leg. It doesn't matter how long it is. Regional freeways can cross regional railways too, so you can build past the railroad tracks if you like.)
Once you place the 4th leg to the intersection, the 300 workers necessary to build will start arriving. If it doesn't register the workers arriving right away, and you're a little impatient, you can close and restart your game. In the video demonstration below, I exited to the main menu and jumped back to the city three times before it worked. If you're not impatient, you can just let it sit and it should eventually build. Both methods work.
The best part about this fix is that it works in both online and offline games. Special thanks goes to Mark Norris from the SimNation Guild who brought this to my attention, tested it out on multiple maps and found that it worked every time. He also found that you can delete the segment after your workers are done building the great work. You can read Mark's comments on the fix below the video.
For a video explanation, you can watch the video below.
If you're in a city that's far away from the great work site, you'll need to be using "CamModB1" (Download here) so that you can see what you're doing. The normal camera mode makes it difficult to see this location.
You'll also need "Skye's Regional Freeway Mod" (Download here).
If you're not sure how to install mods, read my Mod Installation Guide.
By Mark Norris
Which Cities will you need to do this?
The following is a list of Great Work Plots that either work, or can be made to work, for the Space Center. This list is by no means complete, and only represents the plots that I have personally verified. I'll point out that most of these were done in Online Sandbox mode, and I'm 99.9% sure that it doesn't matter (Discovery Delta - East was done in both Sandbox and non-Sandbox, with the same result).
GW Plots that work 'out of the box':
Discovery Delta - North, South, West
Verdant Jungle - North, South
Serenity Key - East
Titan Gorge - North
GW Plots that are bugged, but the workaround works:
Discovery Delta - East
Serenity Key - West
Viridian Woods - North, South, East, West
Titan Gorge - South, East, West
Whitewater Valley *
* Reported by others
GW Plots that are bugged, but the workaround doesn't work:
NONE SO FAR!
When to place and remove the stub
First, if you are seeing workers going to the GW site (by looking at the population overlay) while you are sending resources, you're golden. It's not bugged.
For me, the optimal time to add the freeway stub is when you are about 80% done sending resources. This does two things--1) allows 80% of your resources to flow to the GW with ZERO traffic. 2) allows enough workers to get to the GW before phase 2 starts so that there is very little delay for construction to start.
You should be able to delete the stub after construction has begun. If it stalls again (it shouldn't), just re-add the stub to get it started.
Why remove the stub? If you are concerned that using the Freeway Mod might cause rollbacks or processing issues, you can remove it (and disable the mod). Otherwise, just leave the stub.
Did it work for you?
We hope this helps you out! Did it work or did you run into problems? Leave a comment below so we can learn from each other's experiences and confirm whether or not it's working on every map.