geologist david schwartz says the hayward fault ruptures every 140 to 150 years. >> schwartz: it's been 141 years since the last large earthquake. >> pitts: so it's time? >> schwartzime. it's due. the hayward fault sits right in the middle of the bay area, geographically and population- wise. two million people sit directly on top of it. and when it goes, it will be the first major earthquake to occur in the middle of a modern u.s. city. we haven't had that before. we don't know what the results of that will be. >> pitts: but it will be devastating? >> schwartz: it will be something, i think, that's beyond what we really expect. >> pitts: after the loma prieta quake, the report, "competing against time," put californians on notice that their roads and bridges needed fixing. >> ney: it's what we go back to when we need to remember that we've got to move quickly and we've got to try and get the project completed. >> pitts: okay, you say quickly. the document was done in may of 1990. >> ney: that's right. >> pitts: it's been a long time. >> ney: it has been a long time. >> pitts: now, caltrans has another race against time, with evidence that the existing bridge is f