Q Last Monday morning I was driving from Castro Valley to San Ramon through Crow Canyon in that beautiful stretch of road with nothing but ranches and grasslands on either side.

Patricia Howitt

Castro Valley

A Unfortunately this scenic drive took an unpleasant turn.

Q Right in the middle of my lane was a lighted cigarette butt blowing around in the wake of the cars, the smoke rising from it. I couldn't believe my eyes! The homes, people, livestock and wildlife in the canyon could be annihilated in a wildfire. What would possess anyone to do this, especially in fire season when the danger is very high? Will smokers never learn? Someone, please, help me understand what is going on in their minds.

Patricia Howitt

A This is so stupid. Because of the fire hazard, police recommend calling 911 if you see someone fling a lighted cigarette butt out of a car.

Q Like many, I commute on Highway 24. Over the last few months a huge drop-off has formed across most of the eastbound lanes, at the Brown Street overpass in Lafayette. What has caused this, and are they planning on repairing it soon? I recently had my car suspension repaired and I'm not excited about spending more to fix it again.

Wayne Stolte

Concord

A Repairs will be coming Nov. 19. The soil is mushy and prone to sinking, so Caltrans will raise the concrete slab and fill any voids with a foam injection, as it did recently on I-680 on the Sunol Grade.


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Q When is Dixon Landing Road going to be closed for the underpass for BART? Can they do this after Warren Avenue has been opened? Otherwise, it will be a mess for people trying to scamper from four lanes on Dixon into two lanes on Kato Road.

Pranav Wankawala

A Your wish will be granted. Warren Avenue will reopen in June, while Dixon will be closed late next year. A few days ago the VTA completed one of two bridges allowing freight trains to travel over Mission Boulevard and Warren. This will allow workers to demolish the old freight bridge over Mission and start widening the road, including the ramps to nearby Kato, to extend BART to the South Bay.

Q Has Menlo Park required any traffic mitigation steps from Facebook, given that they've enormously impacted traffic on Highway 84/Dumbarton Bridge, and that's before they build their enormous complex across the street?

Greg S.

A Here is what is planned:

Facebook will foot the bill to add a third right-turn lane from eastbound Willow Road to Bayfront Expressway, extend the right turn/entrance ramp for westbound Willow to 101 north, make numerous bike lane and sidewalk improvements along Willow and build a pedestrian/bike under-crossing beneath Bayfront Expressway for the Bay Trail.

Also, Facebook and Menlo Park have agreed on a cap in the number of trips in and out of the Facebook campus. The city will monitor the number of vehicles with cameras at both entrances to the Facebook east campus and later west campus. To date, Facebook says more than 40 percent of its employees are getting to work by means other than driving solo.

Look for Gary Richards at Facebook.com/mr.roadshow or contact him at mrroadshow@mercurynews.com or 408-920-5335.