Ada Express

{{Short description|Train service}}

{{one source|date=September 2015}}

{{Infobox rail service

| box_width = 30em

| name = Ada Express

| logo =

| logo_width =

| image = Ada Ekspresi Icmeler.jpg

| image_width = 300px

| caption = A westbound train near İçmeler.

| type = Regional rail

| status = Operating

| locale = Northwestern Anatolia

| predecessor = Adapazarı Express

| first = 5 January 2015

| last =

| successor =

| operator = TCDD Taşımacılık

| formeroperator = Turkish State Railways

| ridership =

| start = Gebze station, Gebze

| stops = 11

| end = Adapazarı station, Adapazarı

| distance = {{convert|107.1|km|1|abbr=on}}[http://www.trainsofturkey.com/w/pmwiki.php/History/CFOA CFOA History] - Trains and Railways of Turkey, Trainsofturkey.com.

| journeytime = 1 hour, 15 minutes

| frequency = 6 daily

| trainnumber =

| class =

| access = Yes

| seating = Coach

| sleeping =

| autorack =

| catering = No

| observation =

| entertainment =

| baggage =

| otherfacilities =

| stock = TVS2000, E44000

| gauge = {{track gauge|sg}}

| el = 25 kV AC, 50 Hz

| speed = {{cvt|90|km/h}} (average)
{{cvt|140|km/h}} (max)

| owners = TCDD

| routenumber =

| map = {{Ada Express}}

| map_state = closed

}}

The Ada Express ({{langx|tr|Ada Ekspresi}}) is a limited stop regional train service operating between Gebze, Kocaeli and Adapazarı. It was inaugurated on 5 January 2015 as a replacement for the popular Adapazarı Express train service. However, unlike its predecessor, the Ada Express [https://tcddtrensaatleri.com/bolgesel/adapazari-gebze-tren-saatleri/ Adapazarı Gebze Tren Saatleri] {{in lang|tr}} does not make local stops and run as often and it does not operate into central Adapazarı. Trains mostly consist of TVS2000 cars and use E68000 series locomotives for motive power. Turkey's National Electric Train has also been in use on the Ada Express since May 27, 2023.{{Cite web |date=2023-05-27 |title=Milli elektrikli tren yolculu seferlerine başladı |url=https://www.aa.com.tr/tr/gundem/milli-elektrikli-tren-yolculu-seferlerine-basladi/2907316 |access-date=2023-06-03 |website=www.aa.com.tr}}