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Ted$8roadFan:

--- Quote from: 5foot14 on November 28, 2023, 01:00:42 PM ---
--- Quote from: mariethefoxy on November 28, 2023, 01:05:23 AM ---Question about the pre-big dig configuration. How did things work with the HOV lane on the lower level on 93 heading towards the older Zakim bridge which had only three lanes across? Looking at old footage where people get onto 93 from the Tobin they loop around and that lane becomes the rightmost lane where there are only two lanes on 93 south approaching that merge, then those three lanes go over the old double decker Zakim bridge.

Also that segment itself is a bit strange, was all that extra space for more lanes in the double decker segment in Somerville supposed to tie into the unbuilt I-695 if it was built?

--- End quote ---

The HOV lane didn't exist back then. It was added as an environmental mitigation as a part of the big dig. Yes the extra space would've facilitated the merge from I-695 had it been built. Also the old double decker bridge over the Charles River was named The Charlestown High Bridge. It was never referred to as the Zakim Bridge.

Interestingly, before the loop ramps your referring to were built, ramps to the Tobin Bridge (US 1) connected at a Y Interchange directly north of the High Bridge on the EAST side. Before US 1 was relocated onto the Central Artery, US 1 traversed the Tobin Bridge and continued to Storrow Drive. This meant than anyone who wanted to continue on US 1 South would merge on to the High Bridge in the left lane, have to merge over 2 lanes of heavy traffic to exit to US 1 Storrow Drive on the right, all within the 1/4 mile or so of the High Bridge. The same would apply to those entering North from Storrow Drive and wanting to continue North to US 1 and the Tobin Bridge.

--- End quote ---

The old Y with US-1 and I-93 was white knuckle driving indeed. So much so that the loop ramps were opened to the old High Bridge in 1994 as part of the Central Artery Nirth Area project. This was nearly a decade before the Zakim itself opened.

Great Lakes Roads:

--- Quote from: bob7374 on October 25, 2023, 11:52:09 AM ---MassDOT is holding a public meeting on Thursday 10/26 regarding its proposed reconstruction and widening of the Bowker Overpass that takes traffic to and from the Fenway to Storrow Drive over the Mass Pike and railroad tracks:
https://www.mass.gov/event/boston-bowker-overpass-bridge-superstructure-replacement-and-new-bridge-construction-2023-10-26t180000-0400-2023-10-26t193000-0400

Hopefully, this will include the removal of the remaining signs that still refer to Storrow Drive East as US 1 more than 30 years after the route was rerouted along I-93.

--- End quote ---

//www.youtube.com/watch?v=Rn1v6XjjBow
Virtual meeting of the said project... The project entails the removal of the ramps to and from Commonwealth Avenue and reconfigures the intersection of Boylston Street to include a fourth leg alongside a new (and wider) bridge to accommodate traffic and pedestrians to and from Commonwealth Avenue.

roadman:

--- Quote from: 5foot14 on November 28, 2023, 01:00:42 PM ---
--- Quote from: mariethefoxy on November 28, 2023, 01:05:23 AM ---Question about the pre-big dig configuration. How did things work with the HOV lane on the lower level on 93 heading towards the older Zakim bridge which had only three lanes across? Looking at old footage where people get onto 93 from the Tobin they loop around and that lane becomes the rightmost lane where there are only two lanes on 93 south approaching that merge, then those three lanes go over the old double decker Zakim bridge.

Also that segment itself is a bit strange, was all that extra space for more lanes in the double decker segment in Somerville supposed to tie into the unbuilt I-695 if it was built?

--- End quote ---

The HOV lane didn't exist back then. It was added as an environmental mitigation as a part of the big dig. Yes the extra space would've facilitated the merge from I-695 had it been built. Also the old double decker bridge over the Charles River was named The Charlestown High Bridge. It was never referred to as the Zakim Bridge.

Interestingly, before the loop ramps your referring to were built, ramps to the Tobin Bridge (US 1) connected at a Y Interchange directly north of the High Bridge on the EAST side. Before US 1 was relocated onto the Central Artery, US 1 traversed the Tobin Bridge and continued to Storrow Drive. This meant than anyone who wanted to continue on US 1 South would merge on to the High Bridge in the left lane, have to merge over 2 lanes of heavy traffic to exit to US 1 Storrow Drive on the right, all within the 1/4 mile or so of the High Bridge. The same would apply to those entering North from Storrow Drive and wanting to continue North to US 1 and the Tobin Bridge.

--- End quote ---

Actually, the HOV lane on the Lower Deck existed almost from the opening of the roadway in September, 1973 (the day after Georges Tonka Toy wiped out a support bent on the Charlestown side - note that the Upper and Lower decks didn't receive the I-93 designation until late 1974.).  The left lane served as both the exit to the northbound Tobin Bridge and the HOV lane.  When the lane was being enforced, people without the minimum number of occupants (it was originally 3+) who tried to slip back into the mainline lanes would be pulled over into the gore area, ticketed, and then directed to take the ramp to the Tobin Bridge.  There used to be a right-side slip ramp into City Square northbound just before the start of the bridge, but many people weren't aware of this or were unable to cross over to use it, with the result they ended up in Chelsea.   When work began on the Zakim Bridge/Big Dig, the lane wound up being significantly shortened, and would no longer had an "enforcement" area.  Originally, MassDPW wanted to eliminate the lane completely, but the EPA rejected the idea.   Instead, the start of the lane was extended to just after the Mystic Avenue exit, and a new "enforcement area" was constructed midway along the HOV lane where the road widens at the stub ramp that was supposed to come from the I-695 'clockwise' direction.

mariethefoxy:

--- Quote from: roadman on December 02, 2023, 03:31:12 PM ---
--- Quote from: 5foot14 on November 28, 2023, 01:00:42 PM ---
--- Quote from: mariethefoxy on November 28, 2023, 01:05:23 AM ---Question about the pre-big dig configuration. How did things work with the HOV lane on the lower level on 93 heading towards the older Zakim bridge which had only three lanes across? Looking at old footage where people get onto 93 from the Tobin they loop around and that lane becomes the rightmost lane where there are only two lanes on 93 south approaching that merge, then those three lanes go over the old double decker Zakim bridge.

Also that segment itself is a bit strange, was all that extra space for more lanes in the double decker segment in Somerville supposed to tie into the unbuilt I-695 if it was built?

--- End quote ---

The HOV lane didn't exist back then. It was added as an environmental mitigation as a part of the big dig. Yes the extra space would've facilitated the merge from I-695 had it been built. Also the old double decker bridge over the Charles River was named The Charlestown High Bridge. It was never referred to as the Zakim Bridge.

Interestingly, before the loop ramps your referring to were built, ramps to the Tobin Bridge (US 1) connected at a Y Interchange directly north of the High Bridge on the EAST side. Before US 1 was relocated onto the Central Artery, US 1 traversed the Tobin Bridge and continued to Storrow Drive. This meant than anyone who wanted to continue on US 1 South would merge on to the High Bridge in the left lane, have to merge over 2 lanes of heavy traffic to exit to US 1 Storrow Drive on the right, all within the 1/4 mile or so of the High Bridge. The same would apply to those entering North from Storrow Drive and wanting to continue North to US 1 and the Tobin Bridge.

--- End quote ---

Actually, the HOV lane on the Lower Deck existed almost from the opening of the roadway in September, 1973 (the day after Georges Tonka Toy wiped out a support bent on the Charlestown side - note that the Upper and Lower decks didn't receive the I-93 designation until late 1974.).  The left lane served as both the exit to the northbound Tobin Bridge and the HOV lane.  When the lane was being enforced, people without the minimum number of occupants (it was originally 3+) who tried to slip back into the mainline lanes would be pulled over into the gore area, ticketed, and then directed to take the ramp to the Tobin Bridge.  There used to be a right-side slip ramp into City Square northbound just before the start of the bridge, but many people weren't aware of this or were unable to cross over to use it, with the result they ended up in Chelsea.   When work began on the Zakim Bridge/Big Dig, the lane wound up being significantly shortened, and would no longer had an "enforcement" area.  Originally, MassDPW wanted to eliminate the lane completely, but the EPA rejected the idea.   Instead, the start of the lane was extended to just after the Mystic Avenue exit, and a new "enforcement area" was constructed midway along the HOV lane where the road widens at the stub ramp that was supposed to come from the I-695 'clockwise' direction.

--- End quote ---

During that time when the older High Bridge was still in use and the Tobin ramps were reconfigured to the right side, where did the Carpool lane end? Since I imagine it would have merged into the two main lanes, since the on ramp from the Tobin according to videos I watched added a lane, so then you had three lanes over the High Bridge, the right most lane was an exit only for the Storrow Dr Exit then the onramp right after that Exit made the third lane for the elevated artery

Ted$8roadFan:
Just drove through the I-90/I-95 interchange. MassDOT appears to be changing the ramp from the Mass. Pike to I-95/128 North so that there is less weaving between those going to I-95 north and those exiting at MA-30.

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