Sub-problem 3d: Collector/Distributor Road

Studying the Configuration
Walk through the configuration to become familiar with it. The collector-distributor (C-D) connects to Route 7 eastbound as a single lane exit without a deceleration lane. It continues as a single lane for approximately 250 feet and a new lane is added on the left-hand side. The new left-hand lane becomes the continuation of the C-D road, which means the C-D traffic has to jog left one lane, while the original lane continues ahead to become the start of the right-hand ramp leading to I-787 SB. These two lanes parallel each other for about 1,000 feet until the right-hand lane turns toward I-787 SB south. The left-hand lane, the C-D road, continues on for 1,800 feet until it joins with the I-787 SB/Route 7 EB loop ramp. The one lane C-D road and the one lane loop ramp now become a two-lane facility. These two lanes continue across a bridge for about 260 feet until the right-hand lane becomes the beginning of the loop ramp to I-787 NB. We have a small weaving section that starts with the end of the loop ramp from I-787 SB and ends with the beginning of the loop ramp to I-787 NB. After the loop ramp to I-787 NB turns off to the right, the C-D road continues on another 300 feet where it rejoins Route 7 EB.

What to Study
We’ve already studied the exit from Route 7 EB, the short, single-lane roadway between that point and the spot where the second lane is added, the short double lane section, and the right-hand ramp to I-787 south. In this sub-problem, we are going to focus on the weaving section.