i-95 corridor study - fredericksburg area metropolitan …€¦ · · 2017-12-12i-95 corridor...

I-95 Corridor StudyPhase II Highway Element

LRTP Advisory Committee

December 11, 2017

1

2

1. Met with VDOT to discuss findings of 2045 no-build operations analysis and potential choke points along I-95 corridor

2. Isolated and tested proposed new access points along I-95 to better understand intended and unintended consequences

3. Completed 2030 operations analysis to better understand when certain congestion hot-spots become problematic

4. Prepared list of potential ITS initiatives along I-95 corridor

5. Made slight revisions to alternative bundling

Work Completed since Nov 17 meeting

New Exit 131 access point 2045 traffic impacts

3

Exit 130

Exit 133

Volume IncreaseVolume DecreaseChange in ADT% Change in ADT

-1400

Cowan Blvd

-10

Exit 131 Option C2 Concept

New Harrison Rd access point 2045 traffic impacts

4Exit 126

Exit 130


-1400

Southpoint Pkwy

-10

New Exit 124 access point 2045 traffic impacts

5

Mills Dr

Exit 124

Exit 126


-1400

NewRoadways

-10

SouthpointPkwy

Future No-Build Assumptions(Southbound CD-lane project)

Rappahannock River Crossing

6-Lane to 3-Lane Drop on I-95 SB between Exit 130 and 126

Exit126

Mile

post

128

.7

Not to Scale

After 6 to 3 lane drop, 7,600 veh/hron 3-lane section

Exit 130

Exit 126

I-95 SB Chokepoint

I-95 NB Chokepoint (Exit 130 to Exit 133)

Time Period

I-95 NB between Exit 126 and 130

I-95 NB to Rt 3

EB I-95 NB

Rt 3 EB to I-95

NB I-95 NB

I-95 NB to Rt 3

WB I-95 NB

Rt 3EB (future) + Rt 3 WB to

I-95 NB

I-95 NB Between Exit 130 and 133

Existing Weekday AM 3278 208 3070 1792 4862 400 4462 610 5072Existing Weekday PM 3620 227 3393 984 4377 221 4156 443 4599Existing Sunday PM 4221 185 4036 889 4935 220 4715 443 5158No-Build 2030 Weekday AM 3970 290 3680 3680 440 3240 2520 5760No-Build 2030 Weekday PM 4200 330 3870 3870 280 3590 1600 5190No-Build 2030 Sunday PM 5110 260 4850 4850 240 4610 1250 5860No-Build 2045 Weekday AM 4840 490 4350 4350 450 3900 2770 6670No-Build 2045 Weekday PM 4960 460 4500 4500 290 4210 1880 6090No-Build 2045 Sunday PM 6230 440 5790 5790 250 5540 1240 6780

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2030 NB Demand Volume (veh/hr)

Simulated Throughput

(veh/hr)

% Difference



(veh/hr)

% Difference

Existing Volumes (veh/hr)

South of Exit 126 2850 2841 0% 3640 3632 0% 2273From Exit 126 to Exit 130 3970 3596 9% 4840 4272 12% 3278From Exit 130 to Exit 133 5760 5434 6% 6670 4530 32% 5072From Exit 133 to Exit 136 - Exp. Ln 450 422 6% 660 371 44% NAFrom Exit 133 to Exit 136 4940 4611 7% 5850 3341 43% 4760North of Exit 136 - Exp. Ln 810 745 8% 1190 684 43% NANorth of Exit 136 3840 3353 13% 4060 2301 43% 4007North of Exit 136 3280 3294 0% 3600 3614 0% 2797North of Exit 136 - Exp. Ln 0 0 0 0 NAFrom Exit 136 to Exit 133 3480 3457 1% 3870 3865 0% 2819From Exit 136 to Exit 130 - GP Lane 1920 1865 3% 2200 2193 0%From Exit 133 to Exit 130 - CD Lane 1820 1809 1% 2240 2238 0%From Exit 130 to Exit 126 3330 3282 1% 3960 3781 5% 2685South of Exit 126 2830 2825 0% 3280 3000 8% 2377

I-95 Mainline (Weekday AM Peak Hour)

3041

Direction and Location

I-95 NB

I-95 SB

Legend:Resultant Congestion

Causal Congestion

0 - 10%10% - 25%25% - 50%50% - 75%

75% - 100%

Percentage Throughput Reduction

Weekday AM No-Build Results and Chokepoints

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Weekday PM No-Build Results and Chokepoints


Causal Congestion

0 - 10%10% - 25%25% - 50%50% - 75%

75% - 100%




(veh/hr)

% Difference



(veh/hr)

% Difference


South of Exit 126 3520 3513 0% 4260 4242 0% 3038From Exit 126 to Exit 130 4200 3793 10% 4960 4481 10% 3620From Exit 130 to Exit 133 5190 4107 21% 6090 2610 57% 4599From Exit 133 to Exit 136 - Exp. Ln 0 0 0 0 NAFrom Exit 133 to Exit 136 4910 4025 18% 5610 2218 60% 4233North of Exit 136 - Exp. Ln 0 0 0 0 NANorth of Exit 136 4630 3771 19% 4900 1989 59% 4244North of Exit 136 4330 4339 0% 4910 2836 42% 4843North of Exit 136 - Exp. Ln 840 844 0% 1330 1333 0% NAFrom Exit 136 to Exit 133 4700 4650 1% 5750 2207 62% 4920From Exit 136 to Exit 130 - GP Lane 2980 2940 1% 3390 1631 52%From Exit 133 to Exit 130 - CD Lane 4200 2226 47% 5920 1916 68%From Exit 130 to Exit 126 6050 3546 41% 7600 3872 49% 4216South of Exit 126 3660 2247 39% 5020 2696 46% 2997

I-95 Mainline (Weekday PM Peak Hour)

I-95 NB

I-95 SB 5278


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Sunday PM No-Build Results and Chokepoints


Causal Congestion

0 - 10%10% - 25%25% - 50%50% - 75%

75% - 100%




(veh/hr)

% Difference



(veh/hr)

% Difference


South of Exit 126 5410 4502 17% 6620 4797 28% 4465From Exit 126 to Exit 130 5110 4225 17% 6230 4501 28% 4221From Exit 130 to Exit 133 5860 4577 22% 6780 4621 32% 5158From Exit 133 to Exit 136 - Exp. Ln 430 337 22% 630 430 32% NAFrom Exit 133 to Exit 136 4330 3504 19% 5020 3536 30% 4247North of Exit 136 - Exp. Ln 750 600 20% 1080 754 30% NANorth of Exit 136 4130 3516 15% 4360 3309 24% 4269North of Exit 136 5050 5069 0% 5590 5615 0% 4290North of Exit 136 - Exp. Ln 0 0 0 0 NAFrom Exit 136 to Exit 133 5300 5298 0% 5900 5896 0% 4297From Exit 136 to Exit 130 - GP Lane 2920 2899 1% 3350 3334 0%From Exit 133 to Exit 130 - CD Lane 3190 3058 4% 4000 2359 41%From Exit 130 to Exit 126 5610 4882 13% 6780 5193 23% 4489South of Exit 126 4740 3897 18% 5610 4203 25% 3945

I-95 SB

I-95 Mainline (Weekend Sunday PM Peak Hour)

I-95 NB

4909


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Potential ITS Strategies for I-95 Phase 2 Study

ATSCAdaptive Traffic Signal Control (close to construction stage)

DLRDynamic Lane Reversal

DShLDynamic Shoulder Lane

DSpLDynamic Speed Limit

QWQueue Warning

Dynamic Routing

ICMIntegrated Corridor Management

Dynamic Overflow Transit Parking

Dynamic Parking Reservation

Dynamic Wayfinding

Dynamically Priced Parking

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VDOT Notes

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VDOT Notes (contd) Notes based on quick check on the locations where the 1980s widening of I-

95 was done to the outside, providing a full-depth left/inside shoulder (where the left-hand GP lane had previously been located).

For about of the length of the segment, a full-depth of 12 wide is present and should be available for use as a fourth GP lane.

For the remainder, the width of full-depth on the left shoulder varies from 12 down to 0 (or nearly 0).

Normally, beyond the existing full-depth shoulder (where present), there is 5 1/2 of graded shoulder, then the graded median slope.

The construction of a Standard Shoulder would require approx. 9 of additional width.

The existing median width appears to be a minimum of 88 wide (near the 126 Interchange), so it should be feasible to utilize some of this space for the widened shoulder(s).

All of these measurements should be verified, in the field.

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VDOT Notes (contd) Opening between the piers of the Harrison Rd overpass are 60. The

addition of a 12 lane would not be possible, as minimum shoulder widths could not be achieved. This would likely require the reconstruction of the overpass as part of any widening project.

Pier spacings at the Rte 208 overpass appear to be adequate to allow for an additional lane and shoulder.

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2045

Low Cost Ramp Improvements: Exit 126 to 136

ITS Improvements

I-95 River Crossing

Improvement (NB Crossing & Express Lanes)

New Access

Point at Exit 131

Route 3 Interchange EB to NB 95

Flyover

4th Lane Widening

between Exit 126 and 130

New Interchange at Harrison Rd

and Harrison Rd Widening

Major Exit 126 improvements or New Interchange

at 124Stafford

PkwyNo Build X XNo Build Plus (Low) X X X 1 C1Build 1 (Medium 1) X X 2 T1 C1 S1 H1Build 2 (Medium 2) X X 2 NT1 C2 X S1 H1Build 3 (High 1 ) X X 3 T2 C2 X S2 H2 M1 XBuild 4 (High 2) X X 3 T2 C2 X S2 H2 M2 X

ITS ImprovementsOption 1 Low CostOption 2 Medium CostOption 3 High Cost

I-95 River Crossing Improvement Options (NB Crossing & Express Lanes)

Option T1

Option NTI New NB CD Road from Rte 3 to Exit 133 - 2 Lanes (Traditional NB River Crossing Design)Option T2 New NB Express Lane Toll Road from South of Rte 3 to Exit 133 - 2 Lanes to New Exit 131 at Central Park and then 3 lanes from NB Access to Exit 133

Exit 131 OptionsOption C1 New SB CD Lane offramp onlyOption C2 New SB CD Lane offramp and New NB onramp to Option T2 for NB River Crossing

I-95 Widening Options between Exit 130 & Exit 126Option S1 4th General Purpose Lane SB from Mpt 128.7 to Exit 126 where it does not exist after committed SB River Crossing projectOption S2 4th General Purpose Lane SB and NB between Exit 130 and 126 where it does not exist after committed SB River Crossing project

Harrison Rd ImprovementsOption H1 Only expand bridge to accommodate I-95 wideningOption H2 Expand bridge and road between Salem Church and Route 1 with New Full Interchange

Exit 126 Area Interchange ImprovementsOption M1 Improve existing Exit 126 with braided "Super" ramps to/from Rte 17Option M2 Build New Full Interchange at Exit 124

Stafford ParkwayNew 2 or 4 Lane Roaday from Exit 136 to Rte 17 (West) and Necessary Exit 136 Interchange improvements

2030Future Scenario

Potential Improvements

New NB Express Lane Toll Road from Rte 3 to Exit 133 - 2 Lanes. Near Exit 133, Braided ramps to median with fork such that 1 lane to FREDEX (if applicable) and 1 lane to NB General Purpose

Revised Draft Alternative Bundling

V4

Future Scenario2030Potential Improvements

2045Low Cost Ramp Improvements: Exit 126 to 136ITS ImprovementsI-95 River Crossing Improvement (NB Crossing & Express Lanes)New Access Point at Exit 131Route 3 Interchange EB to NB 95 Flyover4th Lane Widening between Exit 126 and 130New Interchange at Harrison Rd and Harrison Rd WideningMajor Exit 126 improvements or New Interchange at 124Stafford Pkwy

No BuildXX

No Build Plus (Low)XXX1C1

Build 1 (Medium 1)XX2T1C1S1H1

Build 2 (Medium 2)XX2NT1C2XS1H1

Build 3 (High 1 )XX3T2C2XS2H2M1X

Build 4 (High 2)XX3T2C2XS2H2M2X

ITS Improvements

Option 1Low Cost

Option 2Medium Cost

Option 3High Cost

I-95 River Crossing Improvement Options (NB Crossing & Express Lanes)

Option T1New NB Express Lane Toll Road from Rte 3 to Exit 133 - 2 Lanes. Near Exit 133, Braided ramps to median with fork such that 1 lane to FREDEX (if applicable) and 1 lane to NB General Purpose

Option NTINew NB CD Road from Rte 3 to Exit 133 - 2 Lanes (Traditional NB River Crossing Design)

Option T2New NB Express Lane Toll Road from South of Rte 3 to Exit 133 - 2 Lanes to New Exit 131 at Central Park and then 3 lanes from NB Access to Exit 133

Exit 131 Options

Option C1New SB CD Lane offramp only

Option C2New SB CD Lane offramp and New NB onramp to Option T2 for NB River Crossing

I-95 Widening Options between Exit 130 & Exit 126

Option S14th General Purpose Lane SB from Mpt 128.7 to Exit 126 where it does not exist after committed SB River Crossing project

Option S24th General Purpose Lane SB and NB between Exit 130 and 126 where it does not exist after committed SB River Crossing project

Harrison Rd Improvements

Option H1Only expand bridge to accommodate I-95 widening

Option H2Expand bridge and road between Salem Church and Route 1 with New Full Interchange

Exit 126 Area Interchange Improvements

Option M1Improve existing Exit 126 with braided "Super" ramps to/from Rte 17

Option M2Build New Full Interchange at Exit 124

Stafford Parkway

New 2 or 4 Lane Roaday from Exit 136 to Rte 17 (West) and Necessary Exit 136 Interchange improvements

Receive committee feedback on todays presentation

Finalize Bundling of Alternatives

Initiate modeling of future Build Alternative(s) in VISSIM

Report comparative results to Advisory Committee

18

Next Steps

LRTP Advisory CommitteeDecember 11, 2017Work Completed since Nov 17 meetingNew Exit 131 access point 2045 traffic impactsNew Harrison Rd access point 2045 traffic impactsNew Exit 124 access point 2045 traffic impactsSlide Number 6Slide Number 7Slide Number 8Slide Number 9Slide Number 10Weekday PM No-Build Results and ChokepointsSunday PM No-Build Results and ChokepointsPotential ITS Strategies for I-95 Phase 2 StudyVDOT NotesVDOT Notes (contd)VDOT Notes (contd)Revised Draft Alternative BundlingNext Steps

i-95 corridor study - fredericksburg area metropolitan …€¦ · · 2017-12-12i-95 corridor...

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