Q: You have told us that repaving Highway 17 in Santa Clara County is coming up soon. Hallelujah! Any idea how long this will take and the impact it will have on traffic?

Pete Sims and many more

A: Repaving will be underway around Sept. 13 and will continue until 2023 from the summit to Interstate 280. They’ll install rubberized asphalt which will provide a quieter and smoother ride.

The work will include ADA ramp improvements, both upgrades and new installations, at 46 locations. Most work will occur after 8 p.m. and last until 6 a.m. on weekday mornings and a few hours longer on weekend mornings.

For 24/7 traffic updates follow 511.org: https://twitter.com/511SFBAY. For real-time traffic updates, click-on Caltrans QuickMap: https://ift.tt/1eGdJzU.

Q: One of the great advantages of self-driving cars is that there will be convoys of them on freeways packed tightly together travelling safely at high speed. Current roads should be able to handle lots more cars per hour. They are already experimenting with truck convoys like this in Europe. Heck, many new cars already have “lane keep” and “adaptive cruise control” so we are almost there.

How long would it take to widen I-5 if we started today? Ten years?  Twenty? By then there will be enough self-driving cars that the extra lane won’t be needed and we would have wasted millions.

Jim Bodwin, Cupertino

A: You raise a valid point. It would take at least 10 years to add a third lane each direction on I-5. By then, we may see at least convoys of self-driving trucks, with convoys of self-driving cars not far behind.

Q: I know many older people having cataract surgery and corrected vision through inserted lenses. Up until then, they wore contact lenses or eyeglasses.

What is the protocol for drivers licenses that say “corrective lenses” after correcting vision? Licenses aren’t due for several years. Would an officer believe you or is it an infraction for not having “corrective lenses” removed from your license?

Jo Ann Barter, Saratoga

A: To remove the corrective lenses restriction on your driver’s license, go to the DMV and submit a driver’s license card application indicating “correct or update a card.” Once at the office, a DMV employee will conduct a vision screening before the application is completed and an interim license issued.

Since some vision conditions are progressive and can affect one’s ability to drive safely, it’s important for drivers with vision corrections to ensure that they meet the vision screening standard. In addition, drivers must not have any other vision restrictions or conditions that require a driving test or corrective lenses.

Join Gary Richards for an hourlong chat noon Wednesday at https://ift.tt/27E9ALQ. Look for Gary Richards at Facebook.com/mr.roadshow or contact him at mrroadshow@bayareanewsgroup.com