What about a 99.99% reduction in travel? Wuhan has 11 million and 1% of that is 100k, I'd imagine the quarantine is more successful than preventing 100k people from travelling.
[1] https://www.scmp.com/news/china/society/article/3047720/chin...
This is exactly what you can't conclude from the analysis that was done, the numbers matter significantly.
If a 99% restriction locally gives a 25% reduction globally, that tells us very little about what happens with a 99.99% restriction, which is probably closer to what has been achieved.
Sure, if you want to get precise, you can model a 0% reduction in traffic for the first 10 days, then a subsequent reduction to 99.99%. The numbers will be completely different than modelling a reduction to 99% for the whole period.
Quoting numerical estimates without understanding how the underlying model compares to reality, is just stupid.
[1] https://twitter.com/DrEricDing/status/1220919589623803905
And with the city-wide quarantine people should be modelling 99.99% reductions in travel not 99%.
I'm not usually one for relying heavily on authority, but this guy[1] is likely to know when the R0 number looks very, very bad.
Let's cut that down to hundreds.