I mentioned Sweden's change from driving on the left to driving on the right. I had no idea it was happening in my own back yard.
I am accustomed to the cloverleaf interstate interchange but in Florida I have always worried about which lane to be in. Some entrance ramps are entered by turning left from the crossroad while others are entered by turning right. Sometimes the first sign indicating which way to turn is on the bridge and depending on traffic, might be impossible to get to.
Transportation geeks in France designed a new interchange in the 1970s and we are building them in the US (about 150 already). It's called a Diverging Diamond Interchange or DDI. The solution these geeks have come up with is to make everyone change lanes twice on the crossroad while retaining the "should I be in the left or right lane?" question.
I often use Glades Road in Boca Raton to get to Interstate 95 and until now it has been a cloverleaf with all westbound drivers using the right lane to get on I-95 North or South (east or west side of the bridge). Same thing for eastbound drivers. The red lines in this picture show Glades Road's new westbound traffic pattern. It appears to show an Armageddon Bottleneck where all traffic eventually comes to a stop. Every day more than 88,000 drivers travel Glades Road. At 78, I'm one of the youngsters using this road. I can't wait to see the Snow Birds, who don't use a car in their home city, freak out when they see the traffic coming at them from the right. They couldn't handle the roundabouts so this is going to really thin the herd.

Here's what it looks like from the driver's perspective. Imagine Glades Road's 88,000 cars stopped in both directions (or not!) during rush hour. Also imagine the carnage for cyclists and pedestrians -- there are pedestrian lanes on both sides that converge in the middle with a fenced walkway and everyone used to looking left before crossing the road (failing to look right in Sydney or London can get you killed). What could possibly go wrong?
If you are into thrill rides, the Florida Department of Transportation has provided a virtual ride through of the intersection/interchange:
I am accustomed to the cloverleaf interstate interchange but in Florida I have always worried about which lane to be in. Some entrance ramps are entered by turning left from the crossroad while others are entered by turning right. Sometimes the first sign indicating which way to turn is on the bridge and depending on traffic, might be impossible to get to.
Transportation geeks in France designed a new interchange in the 1970s and we are building them in the US (about 150 already). It's called a Diverging Diamond Interchange or DDI. The solution these geeks have come up with is to make everyone change lanes twice on the crossroad while retaining the "should I be in the left or right lane?" question.
I often use Glades Road in Boca Raton to get to Interstate 95 and until now it has been a cloverleaf with all westbound drivers using the right lane to get on I-95 North or South (east or west side of the bridge). Same thing for eastbound drivers. The red lines in this picture show Glades Road's new westbound traffic pattern. It appears to show an Armageddon Bottleneck where all traffic eventually comes to a stop. Every day more than 88,000 drivers travel Glades Road. At 78, I'm one of the youngsters using this road. I can't wait to see the Snow Birds, who don't use a car in their home city, freak out when they see the traffic coming at them from the right. They couldn't handle the roundabouts so this is going to really thin the herd.

Here's what it looks like from the driver's perspective. Imagine Glades Road's 88,000 cars stopped in both directions (or not!) during rush hour. Also imagine the carnage for cyclists and pedestrians -- there are pedestrian lanes on both sides that converge in the middle with a fenced walkway and everyone used to looking left before crossing the road (failing to look right in Sydney or London can get you killed). What could possibly go wrong?
If you are into thrill rides, the Florida Department of Transportation has provided a virtual ride through of the intersection/interchange:





















