The best flowing highways I’ve ever seen were ones where the on ramp didn’t end, but became the off ramp for the next exit. Obviously you can’t have that everywhere, but it’s basically a free flow lane that gives time for adjustment. I’ve also seen on ramps (older ones) that aren’t much more than a turn lane, and dangerous if you don’t know the area and traffic patterns.
The issue with this style of lane design is it basically doubles the amount of lane changes that lane experiences, which can make it the most dangerous possible space if exits are close together. I’ve lived around Dallas. It’s scary.
My area kinda has this except the on ramp ends quickly merging into the right lane, then the off ramp starts almost immediately after. It makes traffic worse as cars trying to get on cannot merge effectively because cars want to be in that lane to exit. I find the best flow is having the off ramp before the on ramp, which minimizes right lane conflicts.
The best flowing highways I’ve ever seen were ones where the on ramp didn’t end, but became the off ramp for the next exit. Obviously you can’t have that everywhere, but it’s basically a free flow lane that gives time for adjustment. I’ve also seen on ramps (older ones) that aren’t much more than a turn lane, and dangerous if you don’t know the area and traffic patterns.
The issue with this style of lane design is it basically doubles the amount of lane changes that lane experiences, which can make it the most dangerous possible space if exits are close together. I’ve lived around Dallas. It’s scary.
My area kinda has this except the on ramp ends quickly merging into the right lane, then the off ramp starts almost immediately after. It makes traffic worse as cars trying to get on cannot merge effectively because cars want to be in that lane to exit. I find the best flow is having the off ramp before the on ramp, which minimizes right lane conflicts.