Environmental Assessment - MdTA

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3. Express Toll Lanes Alternative The Express Toll Lanes Alternative includes: • Two ETLs and four GPLs from north of MD 43 to north of MD 543. • Four GPLs from MD 543 to project limits north of MD 22. Figure II-3 Express Toll Lane Alternative - Typical Roadway Section Express Toll Lane Interchange Options a. I-95/MD 152 Interchange • Option 1A: Diamond with ETL Median Access Ramps • Option 1B: Diamond with ETL Flyover Access Ramps • Option 2: Tight Diamond with ETL Flyover Access Ramps • Option 3: Single Point Urban Diamond with ETL Flyover Access Ramps • Option 4A: Partial Cloverleaf – Single Loop with ETL Median Access Ramps • Option 4B: Partial Cloverleaf – Single Loop with ETL Flyover Access Ramps • Option 5A: Partial Cloverleaf – Double Loop with ETL Median Access Ramps • Option 5B: Partial Cloverleaf – Double Loop with ETL Flyover Access Ramps Section 200 Draft Environment <strong>Assessment</strong> II-9
Analysis: • Option 1A provides the capacity needed for the 2030 traffic volumes while maintaining a footprint that has relatively minor environmental impacts compared to the other Options. Option 1A was retained for detailed study. • Option 1B was dropped due to the extensive environmental impacts and impacts to parkland. Also, the traffic operations for Option 1B were not as efficient as other Options retained for detailed study. • Option 2 was dropped due to a failing LOS for 2030 traffic and extensive environmental impacts. • Option 3 was dropped because the flyover ramps would result in extensive environmental impacts and very high construction cost. Also, maintenance of the bridges in the interchange would be very difficult. • Option 4A provides the necessary operations to serve future traffic volumes while both minimizing environmental impacts and keeping construction costs minimal compared to other Options for this interchange. Option 4A was retained for detailed study. • Options 4B and 5A had significant amount of environmental impacts and residential displacements. They had the same LOS as other Options retained that have less environmental impacts, therefore these options were dropped. • Option 5B was dropped because the loop ramps caused a significant amount of environmental impacts and residential displacements. b. I-95/MD 24 Interchange • Option 1: Partial Cloverleaf – Double Loop with ETL Flyover Access Ramps • Option 2: MD 24/MD 924 Flyover Ramp with ETL Median Access Ramps Analysis: • Option 1 was dropped from further consideration because it was no longer compatible with the Phase 1 interchange improvements being constructed at the I-95/MD 24/MD 924 Interchange. • Option 2 is the most efficient option in addressing the capacity and safety issues at this interchange. Option 2’s engineering and constructability is the most compatible with the recent improvements at the I-95/MD 24/MD 924 Interchange that is currently under construction. c. I-95/MD 543 Interchange • Option 1A: Diamond with ETL Median Access Ramps • Option 1B: Diamond with ETL Flyover Access Ramps Section 200 Draft Environment <strong>Assessment</strong> II-10
Page 1: November2007
Page 4 and 5: Figure S-1: Study Area Map D. Proje
Page 6 and 7: GPL ETL • MD 152: Option 1 • MD
Page 8 and 9: Table S-2. Communities/Right-of-Way
Page 10 and 11: Table of Contents I. PURPOSE AND NE
Page 12 and 13: Figure II-7. MD 543 Option 1 Figure
Page 14 and 15: I. PURPOSE AND NEED A. Identificati
Page 16 and 17: Figure I-1: Study Area Map C. Backg
Page 18 and 19: areas within or connecting county-d
Page 21 and 22: . Safety The accident rate for Sect
Page 23 and 24: Table I-2. AM and PM Average Daily
Page 25 and 26: Table I-4. Crash Data for Years 200
Page 27 and 28: equired to cross 3 or more general
Page 29 and 30: This concept would provide good ove
Page 31 and 32: No Build Interchange Analysis • I
Page 33: • Option 3: Single Point Urban Di
Page 37 and 38: Analysis: • Option 1 would mainta
Page 39 and 40: Two through lanes would generally b
Page 47 and 48: 3. Express Toll Lane Alternative Th
Page 49 and 50: to the I-95 northbound ETLs. Two I-
Page 56 and 57: F. Comparison of Alternatives The f
Page 58 and 59: would be enhanced through a reducti
Page 60 and 61: Table II-2. Estimated Travel Speeds
Page 62 and 63: . MD 152 The future needs forecast
Page 64 and 65: Figure II-16. MD 24 Park and Ride F
Page 66 and 67: III. EXISTING ENVIRONMENT AND IMPAC
Page 68 and 69: Executive Order 12898 defines minor
Page 70 and 71: Table III-2: Population Statistics
Page 72 and 73: Build Alternatives The Build Altern
Page 74 and 75: The study area consists of 7 commun
Page 76 and 77: Table III-4: Communities Located wi
Page 78: Table III-4: Communities Located wi
Page 81 and 82: communities could experience indire
Page 83 and 84: MD 24 Option 2 (Appendix A, Plates
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surrounding communities as the incr
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There are also some minor impacts t
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allow access to and from the ETLs v
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lanes, reduced median width, and th
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volumes and congestion increase thr
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c. Cemeteries In addition to the ce
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points at any of the postal facilit
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The Maryland Transit Administration
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1. Employment Characteristics Table
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geographic base of a particular bus
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would not be altered, aside from th
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543), and the areas both north and
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2. Effects on Land Use No-Build Alt
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The historic architecture APE for t
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an additional 5 land types (alluvia
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• Seeding, sodding, and stabilizi
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2. Aquatic Resources a. Surface Wat
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located within the southeast quadra
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• A permanent WUS impact would in
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The following highlights wetland im
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For an all-inclusive impact summary
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since this area was altered during
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BMPs would include stormwater manag
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year floodplains, 0.8 acres within
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Option 2, MD 543 Option 7, and MD 2
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General Purpose Lanes Alternative T
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impacts more LSTs due to its larger
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Table III-17. Alternative Impacts t
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The No-Build Alternative would have
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improvements, EPA’s MOBILE 6.2 em
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using this facility. Diesel trucks
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The EPA is the lead Federal Agency
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zoning or the development of guidel
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3. Exposure Levels and Health Effec
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cannot evaluate the validity of the
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NSA 07 consists of single family ho
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NSA 20 consists of single family re
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etween the hours of 6:00 AM and 6:0
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Table III-20. Short-term Noise Meas
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• Traffic flow conditions (volume
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averaging. If the average cost per
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Table III-22 Predicted Noise Levels
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Table III-23. Summary of Noise Abat
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Table III-25. Noise Barrier ‘Cost
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The noise barrier investigated is l
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The noise barrier was optimized to
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Express Toll Lanes Alternative The
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NSA 23 The noise barrier investigat
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Express Toll Lanes Alternative The
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The No Build Alternative will not i
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area (the widening of I-95 from MD
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Active Agricultural Land Due to int
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cumulative impacts to floodplains w
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The indirect and cumulative effects
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IV. COORDINATION AND COMMENTS A. Fo
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The fifth Focus Group Meeting was h
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Finally, an update on the status of
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Environmental Assessment - MdTA

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