Traffic in our area is governed by a network of computerized very high tech traffic signals installed at every major intersection. Many if not all of these are coordinated to guide traffic as smoothly as possible through this neighborhood while enforcing sufficient periods for pedestrians to cross the streets. And the timing of these lights is not posted on the lights themselves or anywhere else that I can find.
The timing of the traffic signals changes throughout the day at many intersections. The weekend versus weekday dynamic is covered as well. So our earnest group of neighborhood amateur traffic engineers went forth recently and surveyed many local corners with stopwatches to reverse engineer the prioritization of each individual intersection. This explains the different timing settings for the same intersections on different days or times of the day. (We also rounded our figures to the nearest second while these signals are possibly programmed to the tenth or hundredth of a second.)
A few more words on traffic signals. The base goal is to clear the whole queue of waiting cars in one cycle without wasting any extra time. Correctly balanced the lights provide for the optimal and continuous flow of traffic through any given intersection. The signalized intersections are expensive, starting at $250,000 per corner and going way up from there as you add sensors and other devices to the system.
Traffic Signal Timing in the Castro Upper Market Area
Duboce & Mkt N – 33 E/W – 51 S-59 1/10/17 6-7PM
Duboce & Mkt N – 33 E/W – 50 S-59 1/11/17 8-9AM
Duboce & Mkt N – 33 E/W – 50 S-59 1/15/17 11AM-12
Dolores & Mkt N/S – 31 E/W – 52 1/9/17 1-2PM
Dolores & Mkt N/S – 30 E/W – 52 1/10/17 6-7PM
Dolores & Mkt N/S – 30 E/W – 52 1/11/17 8-9AM
Guerrero & Duboce N-37 E/W – 36 S-50 1-17-17 8-9AM
Guerrero & Duboce N-35 E/W – 38 S-49 1-17-17 5-6PM
Note: Guerrero has a South bound left turn lane onto Duboce set for approx. 12 seconds. Northbound traffic holds while this lane clears.
Guerrero & 14th N/S – 32 E/W – 25 1/17/17 8-9AM
Guerrero & 14th N/S – 32 E/W – 25 1/17/17 5-6PM
Guerrero & 15th N/S – 31 E/W – Blinking Yellow 1/17/17 8-9AM
Guerrero & 15th N/S – 31 E/W – Blinking Yellow 1/17/17 5-6PM
Guerrero & 16th N/S – 30 E/W – 23 1/17//17 8-9AM
Guerrero & 16th N/S – 27 E/W – 25 1/17//17 5-6PM
Guerrero & 17th N/S – 31 E/W – 25 1/17/17 8-9AM
Guerrero & 17th N/S – 31 E/W – 25 1/17/17 5-6PM
Valencia & Duboce N/S – 36 E/W – 49 1/17/17 6-7PM
Valencia & Duboce N/S – 36 E/W – 49 S-36 1/18/17 9-10AM
Note: Valencia has a South bound left turn lane onto Duboce. Use & timing of this option varies.
Valencia & 14th N – 29 E – 21 S – 37 1/17/17 6-7PM
Valencia & 14th N – 29 E – 21 S – 1/18/17 8-9AM
Valencia & 15th N/S – 32 E/W – 21 1/17/17 6-7PM
Valencia & 15th N/S – 32 W – 21 1/18/17 8-9AM
Valencia & 16th N/S – 28 E/W – 29 1/17/17 6-7PM
Valencia & 16th N/S – 28 E/W – 28 1/18/17 8-9AM
Valencia & 17th N/S – 32 E/W – 25 1/17/17 6-7PM
Valencia & 17th N/S – 32 E/W – 25 1/18/17 8-9AM
Dolores & 14th N/S – 28 E/W – 28 1/9/17 1-2PM
Dolores & 14th N/S – 28 E/W – 29 1/10/17 6-7PM
Dolores & 14th N/S – 28 E/W – 29 1/11/17 9-10AM
Dolores & 16th N/S – 26 E/W – 29 1/9/17 1-2PM
Dolores & 16th N/S – 26 E/W – 29 1/11/17 9-10AM
Dolores & 16th N/S – 24 E/W – 33 1/11/17 5-6PM
Dolores & 16th N/S – 26 E/W – 30 1/15/17 11AM-12
Dolores & 17th N/S – 28 E/W – 29 1/9/17 1-2PM
Dolores & 17th N/S – 29 E/W – 27 1/11/17 8-9AM
Dolores & 17th N/S – 26 E/W – 30 1/11/17 5-6PM
Church & Mkt (14th) N/S – 31 E/W – 37 X-24 1/9/17 5-6PM
Church & Mkt (14th) N/S – 31 E/W – 37 X-24 1/10/17 5-6PM
Church & 15th N/S – 31 E/W – 26 1/9/17 8-9AM
Church & 15th N/S – 31 E/W – 26 1/10/17 5-6PM
Church & 16th N/S – 22 E/W – 34 1/9/17 8-9AM
Church & 16th N/S – 29 E/W – 27 1/9/17 6-7PM
Church & 16th N/S – 22 E/W – 34 1/10/17 7-8AM
Church & 16th N/S – 29 E/W – 27 1/11/17 5-6PM
Church & 16th N/S – 30 E/W – 27 1/15/17 11AM-12
Church & 17th N/S – 34 E/W – 24 1/9/17 8-9AM
Church & 17th N/S – 34 E/W – 24 1/10/17 10-11AM
Church & 17th N/S – 34 E/W – 24 1/10/17 5-6PM
Sanchez & Mkt N/S – 26 E/W – 42 1/9/17 8-9AM
Sanchez & Mkt (15th) N/S – 26 E/W – 44 X-23 1/9/17 5-6PM
Sanchez & Mkt (15th) N/S – 26 E/W – 47 X-23 1/10/17 7-8AM
Sanchez & 16th N/S – 20 E/W – 36 1/9/17 8-9AM
Sanchez & 16th N/S – 20 E/W – 36 1/10/17 8-9AM
Sanchez & 16th N/S – 21 E/W – 36 1/11/17 5-6PM
Noe & Mkt N/S – 25 E/W – 45 1/9/17 8-9AM
Noe & Mkt (16th) N/S – 25 E/W – 43 X-23 1/9/17 6-7PM
Noe & Mkt (16th) N/S – 25 E/W – 46 X-20 1/10/17 8-9AM
Noe & Mkt (16th) N/S – 25 E/W – 43 X-23 1/11/17 5-6PM
Special note about streetcar turning movement at Noe & Market. This removes 20 seconds from the overall cycle which is divided evenly between the N/S and the E/W time allotments.
offtracksanfrancisco 