Theme: Change Lanes to Pass - but as always, keep to the right.
17A. Friends of man's best friend: DOG LOVERS. Lovers Lane.
24A. Sport involving some rolling on the grass: LAWN BOWLING. Bowling lane.
37A. Forgetting the unpleasant parts: SELECTIVE MEMORY. Memory lane.
47A. Tidy sum that doesn't sound like much: PRETTY PENNY. "Penny Lane" Beatles (Back story)
58A. Highway segment for slower traffic ... and, literally, what 17-, 24-, 37- and 47-Across each has: RIGHT LANE
Argyle here(in the middle lane, usually). Except for two corners, NE and SW, everything is well interconnected and a fun solve.
1. Drop a line from the dock, say: FISH
5. Normandy battle town: ST. LO
9. Massage targets: ACHEs
14. Together, musically: A DUE. (in Italian)
15. Chips __!: cookies: AHOY
16. Formal-sounding will?: SHALL
19. Columbus craft: PINTA. The actual name of Pinta is unknown. Wiki link
20. For each one: APIECE
21. Diving lake bird: LOON. Our crossword bird.
22. Knight's title: SIR
28. QB-to-receiver six-pointer: TD PASS. Touchdown pass.
30. Rent-a-car giant: AVIS
31. Landed: ALIT, leading to 43. Sitting on: ATOP
32. TV show shown before: RERUN
34. Banned bug spray: DDT. The U.S. banned DDT for agricultural use in 1972.
41. "Good" cholesterol initials: HDL. (High-Density Lipoprotein)
42. Wishes: HOPES
44. List of computer options: MENU
45. "Movin' right along ... ": "ANYHOO...". Humorous alteration of ANYHOW.
52. Overhead trains: ELS. Shortening of elevated trains.
53. Steak order: RARE
54. Contemporary radio station named for its former "easy listening" playlist: LITE FM. (generic name)
56. Leaves out: OMITS
61. Used up: SPENT
62. "So THAT'S what you mean": "I SEE"
63. Physics particle: ATOM
64. Bacon work: ESSAY
65. Lysol target: GERM
66. Drive-__ window: THRU
1. Craze: FAD
2. Knot-tying words: I DO
3. Drug test placebo: SUGAR PILL
4. Beatles' second film: "HELP!"
5. File-renaming command, at times: SAVE AS
6. "Supernatural" network: THE CW. The "CW" name is an abbreviation derived from the first letters of the names of its two parent corporations (CBS and Warner Bros). OK then.
7. Oscar winner Sophia: LOREN. In 1962, she won a Best Actress Oscar for "Two Women", a foreign-language film.
8. Kvetching cries: OYs
9. Nile snake: ASP
10. Flu symptoms: CHILLS
11. Asian capital: HANOI
12. "Tiny Dancer" singer John: ELTON
13. Much street talk: SLANG
18. Many Rembrandts: OILS
22. Squirrel away: STASH
23. Loafed: IDLED
25. Exposes: BARES
26. Reproductive cell: OVUM
27. Cellar reds and whites: WINE
29. Gobbled down: ATE
32. Tear to pieces: RIP UP
33. New Year's __: EVE
34. "Duh ... figure it out!": "DO THE MATH"
35. Slobber: DROOL
36. Printing goofs: TYPOs
38. Newscaster Huntley: CHET
39. Broadway award: TONY
40. Possibly will: MAY
44. Medit. volcano: MT. ETNA
45. Song before the game: ANTHEM
46. Vladivostok veto: NYET. Russian.
47. Narrative writing: PROSE
48. Boat launching aids: RAMPS
49. Great Lakes natives: ERIES
50. Beethoven dedicatee: ELISE. Für Elise(3:38)
51. Algeria neighbor: NIGER
55. London apartment: FLAT
57. Muddy pen: STY
58. Fix, as a fight: RIG
59. Neither here __ there: NOR
60. Down Under bird: EMU