AARoads Forum

National Boards => General Highway Talk => Traffic Control => Topic started by: Amtrakprod on December 17, 2021, 06:20:47 PM

Title: Check out these signal plans!
Post by: Amtrakprod on December 17, 2021, 06:20:47 PM
This is a really neat new signal that is being installed now in Cambridge MA. https://www.cambridgema.gov/-/media/Files/publicworksdepartment/Engineering/cityprojects/inmansquare/inmansq_ifb_compiledplans.pdf (page 80/81 for plans).

Just figured I'd share!

Twitter photo links as well -

Photos of construction: ?s=20

Screenshot of plans: ?s=20

This signal includes 8" and 4" bicycle signals, with all sorts of unique phasing. A transit signal has been planned, and a right turn FYA doghouse. The timing is quite unique as well. One thing I was confused by was the specification for a cowbell tone for the audible pedestrian signal. Guess I'll see what happens when they're activated !
Title: Re: Check out these signal plans!
Post by: tolbs17 on December 17, 2021, 06:28:37 PM
Very unique...

It would be nice if they went from Red to Red-Yellow and then to Green.


We have signals proposed at the US-13/US-264 ALT and Frog level intersection, but it would most likely be a normal design rather than that unique design you listed above.
Title: Re: Check out these signal plans!
Post by: CardInLex on December 17, 2021, 07:28:20 PM
Plans look like they will be using bike boxes and two stage bike turn boxes as well. Love seeing those!
Title: Re: Check out these signal plans!
Post by: Amtrakprod on December 18, 2021, 10:04:41 PM
Plans look like they will be using bike boxes and two stage bike turn boxes as well. Love seeing those!
Protected intersections and bicycle signals are used as well ! I love the 4 bike signals


iPhone
Title: Re: Check out these signal plans!
Post by: Amtrakprod on December 18, 2021, 10:05:59 PM
(https://uploads.tapatalk-cdn.com/20211219/abca92bdee6b1ecdcdd0f444c267b9a1.jpg)
(https://uploads.tapatalk-cdn.com/20211219/907242605848e0b7f272b97bcf38ddcf.jpg)
(https://uploads.tapatalk-cdn.com/20211219/24185e46313945d9162ecc7a6b8cb7e7.jpg)