Because of the dense population in Connecticut, some routes historically were more like "interurban trolley" lines. Interurban railway routes generally did not have letters. In the bus era, surviving interurban routes were assigned letters. The Connecticut Railway & Lighting Co. (CR&L) was leased by the Connecticut Co. from 1905 to 1936. In 1936, after the Connecticut Co. was failing to make its lease payments to Connecticut Railway & Lighting Co., the courts allowed Connecticut Railway & Lighting Co. to repossess the leased lines. And several interurban bus routes became jointly operated, with companies alternating with runs. Some interurban bus service was discontinued after Connecticut Railway & Lighting Co. ceased operations in 1972. But most such service was eventually restored.
Not listed are certain recently created express and shuttle bus routes. Some express services are provided by private operators.
Route Route Bus Letter Streetcar Streetcars Number Name Before 1974 After Route Letter Discontinued 30 Bradley Flyer BDL New Bus 31 New Park Avenue K K3 K 7/27/41 32 Windsor N N2 L 7/27/41 33 Park Street K K5 L 7/27/41 34 Windsor-Internat. N3 New Bus 36 Windsor-Day Hill N7 New Bus 37 New Britain-Jeff. Q4 New Bus 38 Weston Street W3 New Bus 39 New Britain-Retreat Q Q2 Q 5/18/41 40 North Main Street K K2 L 7/27/41 41 New Britain P P P 4/25/37 Interurban (CR&L) 42 Barbour Street K K1 K 7/27/41 43 Campfield Avenue N N1 New Bus 44 Garden Street X S2 New Bus 45 Berlin Tpke. Flyer BTF New Bus 46 Vine Street Q Q1 5/18/41 47 Franklin Avenue T T1 T 4/20/41 50 Blue H.-Cottage Gr. T T4 New Bus 52 Blue Hills Avenue T T8 T 4/20/41 53 Wethersfield U U1 U 5/18/41 54 Blue Hills Extend. T T10 New Bus 55 Hartford-Middletown M U7 M 10/12/31 Interurban 56 Bloomfield Avenue U6 New Bus 58 Albany Avenue U U3 U 5/18/41 59 Locust Street G G New Bus 60 Farmington Avenue E E 7/15/39 61 Broad Street F F2 J 8/30/31 62 Farmington-N. Main E2 New Bus 63 Hillside Avenue D A3 New Bus 64 Farmington-S. Main E5 New Bus 66 Farmington E8 New Bus 69 Capitol Avenue W W 7/27/41 72 Asylum Avenue A A1 G 7/21/24 72 Elizabeth Park A A2 A 11/ 6/26 74 Granby Street S1 New Bus 76 Ashley Street F F1 F 2/ 7/37 80 Buckland Flyer BHF New Bus 82 Tolland-Buckland H. Z Z3 New Bus 83 Silver Lane B New Bus 84 Tolland-Rockville Z1 New Bus 85 MCC Flyer BX New Bus 86 Burnside-Manchester YM New Bus 87 Brewer Street J J New Bus 88 Burnside Avenue Y Y Y 11/ 5/39 (Stafford Springs) Z 6/ 7/28 Interurban 91 Forbes Street X New Bus 92 Tower Avenue L New Bus 94 Park Avenue H2 New Bus 95 Glastonbury O O V 9/21/38 96 John Fitch Blvd. H H1 O 11/ 4/37 Zion Street R K 4/30/38 Fairfield Avenue R R 4/28/35Route to New Britain historically included operation over New Britain Division from Newington to New Britain, leased from Connecticut Railway & Lighting Co. (CR&L) from 1905 to 1936.
The Zion Street/Fairfield Avenue route was discontinued some time after 1968.
Replacement interurban bus service to Stafford Springs briefly operated by New England Transportation Co.