TY  - JOUR
PY  - 1983//
TI  - Traffic Signal Maintenance Requirements
JO  - Journal of transportation engineering
A1  - Kraft, WH
A1  - Doughty, JR
SP  - 471
EP  - 480
VL  - 109
IS  - 3
N2  - <p>[Abstract unavailable]</p> 
LA  - 
SN  - 0733-947X
UR  - http://dx.doi.org/
ID  - ref1
ER  -