In the last column of the table below, AADT represents Annual Average Daily Traffic between 1999-2002 on these county roads.
County Roads in Town of Mamaroneck
| Road | Road Name | From | To | Miles | AADT |
| 74 |
Murray Avenue |
Myrtle Blvd. |
Weaver Street |
0.93 |
5,746 |
| 44A |
Palmer Avenue |
Mamaroneck Tn/Village Ln |
Mamaroneck Avenue |
0.64 |
19,022 |
| 67II |
Palmer Avenue |
New Rocehlle Line |
Larchmont Line |
0.05 |
19,022 |
County Roads in Village of Mamaroneck
| Road | Road Name | From | To | Miles | AADT |
| 8 |
Mamaroneck Avenue |
Mamaroneck Ave Bdg |
Old White Plains Rd |
1.21 |
18,810 |
| 44 |
Palmer Avenue |
Mamaroneck Tn/Village Ln |
Mamaroneck Avenue |
0.93 |
19,022 |
| 8a |
Mamaroneck Ave Bridge |
Harrison Line |
South Abutment |
0.03 |
16,857 |
| 8d |
Mamaroneck Avenue |
Old White Plains Rd |
Mt. Pleasant Ave. |
0.18 |
18,810 |
