I had to laugh at an article I read where it was suggested that watering down the dust from construction was a major "fix".
Can't say if it qualifies as a "major" fix, but it certainly helps. Construction (public works and private development) here is off the charts, and anyone who lives here deals with the daily dust. Hosing down constructions sites to minimize dust dispersal is a fairly common practice, AFAIK.
The conundrum of the public transportation construction efforts here (elevated rail lines) is that these are built (for the most part) along/above main roads. Hence construction causes even more severe traffic issues. Halting construction, where feasible, for short periods of inversion seems like a reasonable public safety initiative?
Seems fine outside now, but it's supposed to be quite bad Fri-Sun.