ENVIRONMENTAL ASSESSMENT Air Quality Technical Report Appendices May 2021 Appendix A: Average Daily Traffic Mainline Forecasts and 2018 Intersection Baseline Volumes N SHEET 1 EXIT 46 EXIT 44 EXIT 43 EXIT 41 To Richmond To Baltimore GEORGETOWN PIKE CHAIN BRIDGE ROAD CLARA BARTON PARKWAY EB WESTPARK DRIVE CLARA BARTON PARKWAY WB 19,860 2,570 10,290 13,100 21,570 11,950 31,810 9,670 GP 89,450 GP 78,100 GP 80,670 GP 70,380 GP 83,410 GP 103,830 GP 113,510 GP 107,950 GP 98,280 GP 130,090 GP X,X GP X,X EXP 16,310 EXP 13,610 EXP 15,080 EXP 9,680 SB EXP to Westpark Dr 1,470 2,700 495 AMERICAN LEGION 2,270 Westpark Dr to NB EXP 3,070 MEMORIAL BRIDGE EXP 14,710 EXP 12,440 EXP 15,510 EXP 11,830 GP 78,250 GP 66,430GP 77,240 GP 65,980 GP 69,580 GP 84,590 GP 96,420 GP 92,090 GP 104,950 GP 99,460 GP 123,180 GP X,X GP X,X 10,810 11,260 X,X GEORGE WASHINGTON MEMORIAL PARKWAY CLARA BARTON PARKWAY EB CLARA BARTON PARKWAY WB GEORGETOWN PIKE DOLLEY MADISON BOULEVARD 123 193 NOT TO SCALE SHEET 2 N EXIT 17 ROUTE 267 EXIT 18/I‐495 EXIT 45 EXIT 19 To Dulles/Leesburg To Washington DC 0 680 , P 84,59 GP 103,830 EXP 9 G EXP 11,830 DOLLY MADISON BOULEVARD 5,160 GP 77,830 GP 73,220 300 16,260 SB EXP 9,380 DTR 62,930 DTR 57,350 DTR 61,390 DTR 76,040 DTR 70,070 DTR 39,460 c DTR 23,200 DTR 29,960 DTR 19,690 DTR 24,850 DTR 27,060 DTR 33,120 DAAR 20,060 DAAR 20,060 5,970 DAAR 5,410 267 DAAR 18,820 DAAR 15,280 DAAR 15,280 DAAR 6,190 1,530 DTR 63,070 DTR 53,890 DTR 57,430 DTR 62,030 DTR 44,050 DTR 30,490 DTR 28,260 DTR 29,040 DTR 19,610 DTR 24,650 DTR 30,840 17,980 780 9,430 24,510 EXP 8,960 GP 67,700 EXP 7,850 ANDERSON ROAD c EXP 9,140 1,290 EXP 14,630 880 0 GP 83,410 EXP EXP 15,51 GP 69,580 684 495 123 NOT TO SCALE 2025 No‐Build ADT Volumes N Sheet 1 EXIT 46 EXIT 44 EXIT 43 EXIT 41 To Richmond To Baltimore GEORGETOWN PIKE CHAIN BRIDGE ROAD CLARA BARTON PARKWAY EB WESTPARK DRIVE CLARA BARTON PARKWAY WB 3,800 11,600 14,000 18,500 10,500 28,300 8,000 GP 98,300 GP 86,200 GP 90,000 GP 78,500 GP 92,500 GP 113,700 GP 124,500 GP 118,600 GP 110,600 GP 94,800 GP 123,200 GP 109,200 GP 110,500 EXP 19,500 EXP 15,300 EXP 17,500 EXP 10,900 EXP 15,700 EXP 22,300 6,600 4,200 SB EXP to Westpark Dr. 2,200 AMERICAN LEGION 3,600 Westpark Dr. to NB EXP 3,700 495 5,200 MEMORIAL BRIDGE EXP 18,400 EXP 14,800 EXP 18,500 EXP 12,900 EXP 16,500 EXP 21,700 GP 88,300 GP 75,600 GP 87,200 GP 75,100 GP 80,600 GP 97,800 GP 110,700 GP 106,100 GP 119,900 GP 103,400 GP 98,500 GP 120,200 GP 108,300 GP 110,100 11,600 12,100 1,800 GEORGE WASHINGTON MEMORIAL PARKWAY CLARA BARTON PARKWAY EB CLARA BARTON PARKWAY WB GEORGETOWN PIKE DOLLEY MADISON BOULEVARD Existing GP Lanes 123 193 Existing Express Lanes Express Lanes improvements by others NOT TO SCALE 2025 No‐Build ADT Volumes Sheet 2 N EXIT 17 ROUTE 267 EXIT 18/I‐495 EXIT 45 EXIT 19 To Dulles/Leesburg To Washington DC 900 , GP 97,800 GP 113,700 EXP 10 EXP 12,900 SPRING HILL ROAD DOLLEY MADISON BOULEVARD 7,900 GP 90,100 GP 81,500 500 18,000 EXP 10,400 DTR 68,900 DTR 62,900 DTR 67,200 DTR 81,700 DTR 73,600 DTR 41,400 c DTR 23,400 DTR 31,200 DTR 20,200 DTR 28,100 DTR 30,400 DTR 37,500 DAAR 21,600 DAAR 21,600 8,100 DAAR 7,100 267 DAAR 21,500 DAAR 16,400 5,500 DTR 27,000 DAAR 7,200 9,200 2,200 DTR 69,600 DTR 59,800 DTR 64,900 DTR 69,900 DTR 49,100 DTR 33,500 DTR 31,100 DTR 32,000 DTR 21,900 DTR 30,200 DTR 37,400 20,700 900 10,100 27,500 EXP 9,400 GP 75,000 3,500 EXP 8,200 ANDERSON ROAD c EXP 10,500 2,300 EXP 17,000 1,500 EXP 17,500 GP 92,500 GP 80,600 EXP 18,500 123 Existing DAAR Lanes 684 495 Existing GP Lanes Existing Express Lanes NOT TO SCALE 2025 Build ADT Volumes N Sheet 1 EXIT 46 EXIT 44 EXIT 43 EXIT 41 To Richmond To Baltimore GEORGETOWN PIKE CHAIN BRIDGE ROAD CLARA BARTON PARKWAY EB WESTPARK DRIVE CLARA BARTON PARKWAY WB 3,800 11,700 15,100 3,100 6,900 7,500 14,000 GP 96,400 GP 84,300 GP 88,100 GP 76,500 GP 90,500 GP 107,900 GP 101,900 GP 97,500 GP 104,400 GP 119,500 GP 105,500 GP 106,900 EXP 23,100 EXP 19,200 EXP 21,600 EXP 24,500 EXP 22,100 EXP 30,900 SB EXP to Westpark Dr. 2,500 4,000 495 AMERICAN LEGION 3,400 Westpark Dr. to NB EXP 4,200 MEMORIAL BRIDGE EXP 23,500 EXP 20,000 EXP 24,200 EXP 29,400 EXP 27,600 EXP 34,900 GP 86,400 GP 73,600 GP 85,200 GP 73,100 GP 78,600 GP 91,700 GP 87,100 GP 95,800 GP 91,200 GP 110,200 GP 98,300 GP 100,100 11,600 12,100 1,800 GEORGE WASHINGTON MEMORIAL PARKWAY CLARA BARTON PARKWAY EB CLARA BARTON PARKWAY WB GEORGETOWN PIKE DOLLEY MADISON BOULEVARD Existing GP Lanes GP Lane improvements as part of this project Existing Express Lanes 123 193 Express Lanes improvements by others Express Lanes improvements as part of this project NOT TO SCALE 2025 Build ADT Volumes N Sheet 2 EXIT 17 ROUTE 267 EXIT 18/I‐495 EXIT 45 EXIT 19 To Dulles/Leesburg To Washington DC GP 91,700 EXP 29,400 EXP 24,500 GP 107,900 SPRING HILL ROAD DOLLEY MADISON BOULEVARD GP 84,600 7,500 GP 79,500 10,200 18,200 DTR 19,500 EXP 18,300 EXP 14,300 DTR 73,900 DTR 67,800 DTR 72,300 DTR 88,100 DTR 69,800 DTR 41,500 c DTR 23,300 DTR 30,400 DTR 21,900 DTR 29,300 DTR 31,800 DTR 37,700 DAAR 21,700 DAAR 21,700 18,200 DAAR 5,900 267 DAAR 21,600 DAAR 14,700 4,200 DTR 25,200 DAAR 6,800 7,900 2,400 DTR 72,400 DTR 63,000 DTR 69,900 DTR 75,100 DTR 45,200 DTR 32,000 DTR 29,600 DTR 30,600 DTR 22,400 DTR 31,100 DTR 37,900 29,900 7,100 1,000 8,200 24,200 8,700 3,800 GP 72,700 EXP 14,500 EXP 11,900 ANDERSON ROAD c EXP 14,600 EXP 22,500 2,600 1,700 GP 78,600 GP 90,500 EXP 21,600 EXP 24,200 Existing DAAR Lanes Existing GP Lanes 684 495 123 GP Lane improvements by others Existing Express Lanes NOT TO SCALE Express Lanes improvements as part of this project N 2045 NO BUILD ADT VOLUMES SHEET 1 EXIT 46 EXIT 44 EXIT 43 EXIT 41 To Richmond To Baltimore GEORGETOWN PIKE CHAIN BRIDGE ROAD CLARA BARTON PARKWAY EB WESTPARK DRIVE CLARA BARTON PARKWAY WB 15,900 6,400 12,900 16,100 19,000 16,800 10,500 26,400 6,300 GP 114,000 GP 100,700 GP 107,000 GP 94,100 GP 132,300 GP 151,500 GP 143,500 GP 137,200 GP 117,800 GP 144,200 GP 125,200 GP 126,200 EXP 26,700 EXP 20,900 EXP 25,300 EXP 19,200 EXP 19,400 EXP 31,400 5,800 SB EXP to Westpark Dr 4,400 AMERICAN LEGION 4,900 Westpark Dr to NB EXP 6,000 495 MEMORIAL BRIDGE GP 88,000 EXP 23,200 EXP 18,400 EXP 24,400 EXP 19,600 GP 139,100 EXP 19,800 EXP 29,200 GP 96,800 GP 81,500GP 96,300 GP 81,800 GP 90,600 GP 68,400 GP 134,900 GP 126,600 GP 119,300 GP 116,100 GP 136,800 GP 124,200 GP 125,800 46,900 14,800 14,500 1,600 GEORGE WASHINGTON MEMORIAL PARKWAY CLARA BARTON PARKWAY EB CLARA BARTON PARKWAY WB GEORGETOWN PIKE DOLLEY MADISON BOULEVARD 123 193 NOT TO SCALE 2045 NO BUILD ADT VOLUMES N SHEET 2 EXIT 17 ROUTE 267 EXIT 18/I‐495 EXIT 45 EXIT 19 To Dulles/Leesburg To Washington DC 200 , 46,900 SPRING HILL ROAD GP 68,400 GP 132,300 EXP 19 EXP 19,600 11,500 900 EXP 18,300 c 700 GP 93,600 53,200 19,400 DTR 80,700 DTR 87,500 DTR 24,500 DTR 32,600 DTR 20,300 DTR 31,800 DTR 34,400 DTR 42,600 2,700 9,700 DAAR 22,600 DAAR 22,600 DAAR 15,800 DAAR 10,800 DAAR 8,200 c 267 DAAR 23,600 DAAR 20,100 DTR 28,100 DAAR 9,000 DTR 26,500 5,500 4,300 DTR 60,400 GP 78,300 DTR 87,500 DTR 76,100 DTR 79,700 DTR 86,900 DTR 32,000 DTR 32,900 DTR 21,700 DTR 33,600 DTR 42,500 26,500 600 1,000 11,300 6,400 EXP 13,200 GP 71,700 GP 68,400 EXP 14,000 ANDERSON ROAD c 3,400 700 GP 89,700 EXP 22,000 2,400 4,500 15,500 GP 94,100 GP 90,600 EXP 25,300 16,100 EXP 24,400 DOLLEY MADISON BOULEVARD 684 495 123 NOT TO SCALE N 2045 Build ADT Volumes Sheet 1 EXIT 46 EXIT 44 EXIT 43 EXIT 41 To Richmond To Baltimore GEORGETOWN PIKE CHAIN BRIDGE ROAD 16,100 CLARA BARTON PARKWAY EB WESTPARK DRIVE CLARA BARTON PARKWAY WB 12,900 2,800 7,600 15,100 22,500 7,400 GP 115,900 GP 102,600 GP 89,700 GP 125,600 GP 118,000 GP 113,400 GP 121,000 GP 136,100 GP 117,100 GP 118,000 EXP 27,800 EXP 21,800 EXP 26,200 EXP 37,700 EXP 36,900 EXP 47,400 6,000 SB EXP to Westpark Drive 4,400 AMERICAN LEGION 5,100 495 Westpark Drive to NB EXP 6,700 MEMORIAL BRIDGE EXP 24,100 EXP 19,000 EXP 25,600 EXP 39,100 EXP 38,300 EXP 46,600 GP 99,800 GP 70,000 GP 52,000 GP 113,100 GP 103,500 GP 110,900 GP 106,300 GP 126,100 GP 113,500 GP 115,100 14,800 25,400 61,100 1,600 14,500 GEORGE WASHINGTON MEMORIAL PARKWAY CLARA BARTON PARKWAY EB CLARA BARTON PARKWAY WB GEORGETOWN PIKE DOLLEY MADISON BOULEVARD Exisiting GP Lanes GP Lane improvements by others GP Lane improvements as part of this project Exisiting Express Lanes 123 193 Express Lanes improvements by others Express Lanes improvements as part of this project NOT TO SCALE 2045 Build ADT Volumes N Sheet 2 EXIT 17 ROUTE 267 EXIT 18/I‐495 EXIT 45 EXIT 19 To Dulles/Leesburg To Washington DC 61,100 GP 52,000 EXP 37,700 EXP 39,100 GP 125,600 SPRING HILL ROAD 42,000 18,000 10,500 EXP 19,600 11,500 7,500 1,000 c 34,000 GP 85,400 DTR 77,000 DTR 83,400 DTR 91,600 DTR 40,700 DTR 21,400 DTR 30,100 DTR 19,600 DTR 31,100 DTR 33,700 DTR 42,200 DTR 57,600 DTR 17,700 19,300 2,300 5,200 DAAR 24,200 DAAR 16,000 DAAR 10,800 DAAR 8,500 c DAAR 9,000 267 DAAR 27,600 DAAR 27,100 DAAR 21,300 3,400 DAAR 9,000 14,700 1,900 1,800 DTR 19,500 * ** EXP 20,800 DTR 94,000 DTR 82,400 DTR 82,800 DTR 73,900 DTR 81,300 DTR 32,400 DTR 41,400 DTR 62,100 18,400 18,500 11,300 600 DTR 28,800 13,800 4,600 8,600 DTR 15,000 4,700 * DTR 17,700 ** 1,000 GP 58,400 EXP 13,700 EXP 14,900 21,800 ANDERSON ROAD c 3,500 18,400 2,500 7,100 EXP 23,100 GP 71,200 50,400 22,500 GP 89,700 EXP 26,200 EXP 25,600 GP 45,000 Existing DAAR Lanes DAAR improvements Exisiting GP Lanes DOLLEY MADISON BOULEVARD GP Lane improvements by others GP Lane improvements as part of this project 684 495 123 Exisiting Express Lanes Express Lanes improvements by