Second Post: Okay here is the other example. This was the 3rd DDI built in Utah, The prior American Fork was 1st (2nd in nation, Missouri I believe built the 1st) # 2 is up in Salt Lake valley, Lehi was 4th, the 5th just opened a couple months ago down in St. George UT.
This is the American Fork 500 East interchange.
I like this one because it's the most elegant of the limited space DDI's to date. (I have three more under construction or announced to be built this year in Utah). As I said in the last post, if you run across one feel free to experiment. But having mapped multiple DDI's now and driven four of them, three of them frequently. This is really the way I would recommend we go on these. I understand the desire for simplicity but having a DOT that has decided that creativity has proven to improve traffic flow, I have multiple interchange types that simply do not fit the simple is best rule.
Examples:
Continuous Flow Interchanges (CFI) Example Linky (several of these built in the last three to four years).
Thru-turn's: Linky (so far two with at least one more just announced).
And this mess: Linky Combo of the CFI and a traffic circle in close proximity to a SPUI. It still throws occasional errors. (I swear Waze forgets turn restrictions from time to time. I've gone over that interchange again and again with a fine tooth comb, yet we see just recently a couple more UR/MP's due to a turn restriction not being set. I've checked and double checked every turn restriction there multiple times and Jemay's gone over it at least once due to a turn restriction suddenly going from green to red.)
Creative DOT engineers, make mapping so much fun.
This is the American Fork 500 East interchange.
I like this one because it's the most elegant of the limited space DDI's to date. (I have three more under construction or announced to be built this year in Utah). As I said in the last post, if you run across one feel free to experiment. But having mapped multiple DDI's now and driven four of them, three of them frequently. This is really the way I would recommend we go on these. I understand the desire for simplicity but having a DOT that has decided that creativity has proven to improve traffic flow, I have multiple interchange types that simply do not fit the simple is best rule.
Examples:
Continuous Flow Interchanges (CFI) Example Linky (several of these built in the last three to four years).
Thru-turn's: Linky (so far two with at least one more just announced).
And this mess: Linky Combo of the CFI and a traffic circle in close proximity to a SPUI. It still throws occasional errors. (I swear Waze forgets turn restrictions from time to time. I've gone over that interchange again and again with a fine tooth comb, yet we see just recently a couple more UR/MP's due to a turn restriction not being set. I've checked and double checked every turn restriction there multiple times and Jemay's gone over it at least once due to a turn restriction suddenly going from green to red.)
Creative DOT engineers, make mapping so much fun.
Re: [Broken Link] Limited Access Interchange Style Guide