15 miles, about 46 minutes with the wheels rolling, about 51 minutes overall. Homeward bound is about two minutes slower.

I'm experimenting with different starting times to see if I can avoid the perpetual 9:00am traffic jam on the bridge over the freeway about a mile from the office. Also, leaving a bit earlier to encounter less traffic will reduce the other red lights en route, for less time standing and less time accelerating, so more energy will be left for cruising faster.